Question: Animals and plants are made up of a number of different chemical elements. What happens to all of these elements when animals and plants die?

Choices:
A. They die with the animal or plant.
B. They evaporate into the atmosphere.
C. They are recycled back into the environment.
D. They change into different elements.

Answer: C

They are recycled back into the environment.

Question: Animals and plants are made up of a number of different chemical elements. What happens to all of these elements when animals and plants die?
Answer:


Question: Henry learned that without the right kind of energy, plants cannot survive. What form of energy is used by plants to perform photosynthesis?

Choices:
A. electrical
B. light
C. mechanical
D. wind

Answer: B

Question: Henry learned that without the right kind of energy, plants cannot survive. What form of energy is used by plants to perform photosynthesis?
Answer:


Question: Which type of rock is formed when particles are compacted and cemented together?

Choices:
A. igneous
B. metallic
C. metamorphic
D. sedimentary

Answer: D

Question: Which type of rock is formed when particles are compacted and cemented together?
Answer:


Question: The process of water changing from its liquid state to a gas in the water cycle is known as

Choices:
A. precipitation.
B. evaporation.
C. condensation.
D. translation.

Answer: B

Question: The process of water changing from its liquid state to a gas in the water cycle is known as
Answer:


Question: A student performed an experiment to see how long it would take for a cup of water to freeze. Which information would another student most likely need in order to perform the same experiment?

Choices:
A. the time to begin
B. the volume of the cup
C. the temperature of the ice
D. the type of thermometer to use

Answer: B

Question: A student performed an experiment to see how long it would take for a cup of water to freeze. Which information would another student most likely need in order to perform the same experiment?
Answer:


Question: What season is it in the United States when the South Pole is tilted toward the Sun?

Choices:
A. summer
B. fall
C. winter
D. spring

Answer: C

Question: What season is it in the United States when the South Pole is tilted toward the Sun?
Answer:


Question: Over a long period, some flowering plants have become dependent on honey bees for pollination. In recent years, a form of mite has infected and killed the honey bees in many areas of the country. Since this has happened, the once bee-dependent plants with the best chance of surviving are those that

Choices:
A. grow taller so that the few remaining honey bees will find them.
B. change their flowers so that wind will fertilize them.
C. have always attracted many other insects as wells as honey bees.
D. have seeds that stay alive for a long time in the environment.

Answer: C

have always attracted many other insects as wells as honey bees.

Question: Over a long period, some flowering plants have become dependent on honey bees for pollination. In recent years, a form of mite has infected and killed the honey bees in many areas of the country. Since this has happened, the once bee-dependent plants with the best chance of surviving are those that
Answer:


Question: Which statement explains why ducklings follow their mother when swimming across a pond?

Choices:
A. Survival behavior is acquired by interaction with the parent duck.
B. Survival behavior is learned by interacting with their environment.
C. Inherited behavior is genetically obtained through their environment.
D. Inherited behavior is genetically passed on from parents to offspring.

Answer: D

Inherited behavior is genetically passed on from parents to offspring.

Question: Which statement explains why ducklings follow their mother when swimming across a pond?
Answer:


Question: Which procedure correctly describes materials combining?

Choices:
A. Salt and sand are added to hot water and stirred making a mixture.
B. Oil and water are placed in a sealed bottle and shaken making a compound.
C. Sugar and water are added to flour and cooked in an oven making an element.
D. Soil and water are shaken in a container and left to separate forming two elements.

Answer: A

Salt and sand are added to hot water and stirred making a mixture.

Question: Which procedure correctly describes materials combining?
Answer:


Question: An electric motor is designed to turn electrical energy into ___.

Choices:
A. solar energy
B. potential energy
C. static electricity
D. mechanical energy

Answer: D

Question: An electric motor is designed to turn electrical energy into ___.
Answer:


Question: Humans can do many things to impact the environment. Which of these is an example of how humans negatively impact the environment?

Choices:
A. planting more trees
B. burning less fossil fuel
C. reducing beach erosion
D. increasing water runoff

Answer: D

Question: Humans can do many things to impact the environment. Which of these is an example of how humans negatively impact the environment?
Answer:


Question: Which of the following explains why elements, such as carbon and oxygen, that are used in organic molecules are not permanently removed from the environment?

Choices:
A. They are replenished by sunlight.
B. They are cycled through ecosystems.
C. They are replaced by volcanic eruptions.
D. They are produced constantly from nutrients.

Answer: B

Question: Which of the following explains why elements, such as carbon and oxygen, that are used in organic molecules are not permanently removed from the environment?
Answer:


Question: Which substance is magnetic and conducts heat?

Choices:
A. wood
B. plastic
C. iron
D. paper

Answer: C

Question: Which substance is magnetic and conducts heat?
Answer:


Question: Which of the following is true regarding the properties of an air mass?

Choices:
A. An air mass is warmer at the leading edge and cooler at the trailing edge.
B. An air mass has similar temperature and moisture properties throughout it.
C. An air mass is cooler near the edges and has greater moisture near the center.
D. An air mass has greater moisture near the edges and is cooler near the center.

Answer: B

An air mass has similar temperature and moisture properties throughout it.

Question: Which of the following is true regarding the properties of an air mass?
Answer:


Question: What happens to sugar when it is combined with water?

Choices:
A. it separates
B. it dissolves
C. it floats to the top
D. it becomes warm

Answer: B

Question: What happens to sugar when it is combined with water?
Answer:


Question: What can scientists learn about the past by studying sedimentary rocks?

Choices:
A. how a species changed over time
B. how animals made a shelter
C. the color of leaves on a plant
D. the number of chambers in a dinosaur's heart

Answer: A

Question: What can scientists learn about the past by studying sedimentary rocks?
Answer:


Question: Which of the following statements best describes how the use of interchangeable parts has affected car manufacturing?

Choices:
A. The number of cars produced has decreased.
B. The need for custom manufacturing has increased.
C. The efficiency of manufacturing plants has increased.
D. The number of countries producing cars has decreased.

Answer: C

The efficiency of manufacturing plants has increased.

Question: Which of the following statements best describes how the use of interchangeable parts has affected car manufacturing?
Answer:


Question: Aphids are small insects that sometimes live near ants. The ants protect the aphids from predators. The aphids produce a sweet substance that the ants eat. Which statement describes the relationship between ants and aphids?

Choices:
A. Both ants and aphids benefit.
B. Both ants and aphids are unaffected.
C. The ants benefit and the aphids are harmed.
D. The aphids benefit and the ants are unaffected.

Answer: A

Question: Aphids are small insects that sometimes live near ants. The ants protect the aphids from predators. The aphids produce a sweet substance that the ants eat. Which statement describes the relationship between ants and aphids?
Answer:


Question: Two students went fishing one morning and caught 20 fish. The afternoon before, they caught 5 fish. Because of their morning success, they claimed that morning was the best time to fish. Which of these would most likely disprove their claim?

Choices:
A. catching more than 20 fish in the same location
B. catching more than 20 fish in another location
C. catching more than 20 fish the next afternoon
D. catching more than 20 fish the next morning

Answer: C

catching more than 20 fish the next afternoon

Question: Two students went fishing one morning and caught 20 fish. The afternoon before, they caught 5 fish. Because of their morning success, they claimed that morning was the best time to fish. Which of these would most likely disprove their claim?
Answer:


Question: A student investigated the effect of the color of light on the growth of plants. Red, yellow, and green lights were used in the experiment. If another student were to conduct the same experiment, which would be the most important procedure to follow to yield the same results?

Choices:
A. to do the investigation at the same time of year
B. to use the same chart for recording growth
C. to do the investigation in the same room
D. to use the same colors of lights

Answer: D

Question: A student investigated the effect of the color of light on the growth of plants. Red, yellow, and green lights were used in the experiment. If another student were to conduct the same experiment, which would be the most important procedure to follow to yield the same results?
Answer:


Question: What is the main reason humans need nitrogen to survive?

Choices:
A. Nitrogen is used in respiration to generate energy.
B. Nitrogen is used in making the proteins in the body.
C. Nitrogen is used to help the body eliminate wastes.
D. Nitrogen is used by nerve cells to conduct impulses.

Answer: B

Nitrogen is used in making the proteins in the body.

Question: What is the main reason humans need nitrogen to survive?
Answer:


Question: Air is composed of nitrogen, oxygen, and other gases. Based on that information, air can be described as

Choices:
A. a compound.
B. an element.
C. a mixture.
D. a molecule.

Answer: C

Question: Air is composed of nitrogen, oxygen, and other gases. Based on that information, air can be described as
Answer:


Question: Gravity is a measurable force of attraction which acts upon objects. Which characteristic determines the gravity of an object?

Choices:
A. friction
B. mass
C. tension
D. weight

Answer: B

Question: Gravity is a measurable force of attraction which acts upon objects. Which characteristic determines the gravity of an object?
Answer:


Question: Which characteristic does a euglena share with an amoeba?

Choices:
A. They reproduce by mitosis.
B. They eat by phagocytosis.
C. They respond to light stimuli.
D. They move by changing shape.

Answer: A

Question: Which characteristic does a euglena share with an amoeba?
Answer:


Question: Which statement best describes the effect deforestation has on Earth's atmosphere?

Choices:
A. The amount of oxygen increases.
B. The amount of methane increases.
C. The amount of water vapor increases.
D. The amount of carbon dioxide increases.

Answer: D

Question: Which statement best describes the effect deforestation has on Earth's atmosphere?
Answer:


Question: The instructions below outline the procedure for a demonstration. Materials: four 100 g metal blocks, each of a different metal four polystyrene foam cups, each containing 150 g of 10°C water Procedure: 1. Place the four cups of water next to each other on the lab bench. 2. Heat each block to a temperature of 60°C. 3. Place each heated block in a separate cup of 10°C water. 4. Measure the temperature change in each cup of water after 100 s. At the end of the demonstration, which block raised the temperature of the 10°C water the greatest amount?

Choices:
A. the block with the greatest density
B. the block with the lowest surface area
C. the block with the greatest specific heat
D. the block with the lowest thermal conductivity

Answer: C

the block with the greatest specific heat

Question: The instructions below outline the procedure for a demonstration. Materials: four 100 g metal blocks, each of a different metal four polystyrene foam cups, each containing 150 g of 10°C water Procedure: 1. Place the four cups of water next to each other on the lab bench. 2. Heat each block to a temperature of 60°C. 3. Place each heated block in a separate cup of 10°C water. 4. Measure the temperature change in each cup of water after 100 s. At the end of the demonstration, which block raised the temperature of the 10°C water the greatest amount?
Answer:


Question: The purpose of thorns on a plant is most likely to

Choices:
A. help the plant to get moisture.
B. anchor the plant in the ground.
C. protect the plant from harm.
D. support the stems and branches.

Answer: C

Question: The purpose of thorns on a plant is most likely to
Answer:


Question: A pan containing hot water is left on the counter and becomes cool mainly due to

Choices:
A. water molecules moving apart.
B. cold air penetrating the hot water.
C. heat from the water moving into the cooler air.
D. hot water reacting with the metal pan.

Answer: C

heat from the water moving into the cooler air.

Question: A pan containing hot water is left on the counter and becomes cool mainly due to
Answer:


Question: Which is needed to determine the amount of gravitational force between two objects?

Choices:
A. weight and time
B. distance and mass
C. volume and mass
D. area and weight

Answer: B

Question: Which is needed to determine the amount of gravitational force between two objects?
Answer:


Question: When ocean waters become too warm, some whales travel to colder water. This movement is an example of

Choices:
A. nest building
B. hunting
C. migrating
D. hibernating

Answer: C

Question: When ocean waters become too warm, some whales travel to colder water. This movement is an example of
Answer:


Question: The surface of Earth is composed of large tectonic plates that are constantly shifting as they float on top of molten rock. Which process must occur in the mantle to make the plates move?

Choices:
A. normal faulting
B. seafloor spreading
C. igneous intrusions
D. convection currents

Answer: D

Question: The surface of Earth is composed of large tectonic plates that are constantly shifting as they float on top of molten rock. Which process must occur in the mantle to make the plates move?
Answer:


Question: Which force causes a bicycle to slow down when the brakes are used?

Choices:
A. friction
B. electricity
C. gravity
D. magnetism

Answer: A

Question: Which force causes a bicycle to slow down when the brakes are used?
Answer:


Question: Rosa and Ted ate granola bars before competing in a swimming competition. Less than 50% of the chemical energy in the granola bars was converted to mechanical energy during the swim competition. If all the energy in the granola bars was used, which most likely happened to the rest of the energy?

Choices:
A. It was lost as potential energy.
B. It was lost as chemical energy.
C. It was converted to thermal energy.
D. It was converted to magnetic energy.

Answer: C

Question: Rosa and Ted ate granola bars before competing in a swimming competition. Less than 50% of the chemical energy in the granola bars was converted to mechanical energy during the swim competition. If all the energy in the granola bars was used, which most likely happened to the rest of the energy?
Answer:


Question: What is an energy change that takes place in a light bulb?

Choices:
A. Chemical energy changes to light energy.
B. Chemical energy changes to heat energy.
C. Electrical energy changes to light energy.
D. Electrical energy changes to chemical energy.

Answer: C

Electrical energy changes to light energy.

Question: What is an energy change that takes place in a light bulb?
Answer:


Question: Monica learned that humans are born knowing how to do some things and they learn how to do other things. Which is a behavior humans learn?

Choices:
A. blinking
B. breathing
C. crying
D. swimming

Answer: D

Question: Monica learned that humans are born knowing how to do some things and they learn how to do other things. Which is a behavior humans learn?
Answer:


Question: Recycling is important to the environment because it

Choices:
A. is a good way to earn money.
B. produces more carbon dioxide for plants.
C. decreases the amount of natural resources.
D. is a way of conserving nonrenewable resources.

Answer: D

is a way of conserving nonrenewable resources.

Question: Recycling is important to the environment because it
Answer:


Question: In which of the following organs is an acid produced?

Choices:
A. esophagus
B. large intestine
C. small intestine
D. stomach

Answer: D

Question: In which of the following organs is an acid produced?
Answer:


Question: The cells of organisms found in the phylum Porifera (sponges) are not organized into tissues. What structures are absent in organisms belonging to the phylum Porifera?

Choices:
A. organelles
B. cells
C. genes
D. organs

Answer: D

Question: The cells of organisms found in the phylum Porifera (sponges) are not organized into tissues. What structures are absent in organisms belonging to the phylum Porifera?
Answer:


Question: Teresa is making a list of the similarities and differences between a euglena and a volvox cell. In which way is the euglena different from the volvox cell?

Choices:
A. A euglena can respond to light.
B. A euglena can live in fresh water.
C. A euglena can regulate water intake.
D. A euglena can only reproduce asexually.

Answer: D

Question: Teresa is making a list of the similarities and differences between a euglena and a volvox cell. In which way is the euglena different from the volvox cell?
Answer:


Question: A hardware designer finds that the wiring in a circuit is releasing enough heat to make the circuit dangerously hot. Which change would best solve this problem?

Choices:
A. increasing the current in the circuit
B. placing rubber insulation on wires in the circuit
C. reversing the direction of current flow in the circuit
D. using circuit wires with a lower resistance

Answer: D

using circuit wires with a lower resistance

Question: A hardware designer finds that the wiring in a circuit is releasing enough heat to make the circuit dangerously hot. Which change would best solve this problem?
Answer:


Question: A brown bear eats a variety of foods including berries, insects, and small animals. Which best describes a brown bear?

Choices:
A. producer
B. herbivore
C. carnivore
D. omnivore

Answer: D

Question: A brown bear eats a variety of foods including berries, insects, and small animals. Which best describes a brown bear?
Answer:


Question: When the velocity of an ocean wave decreases as it approaches a shore, what happens to the wave?

Choices:
A. Its height increases.
B. Its height decreases.
C. Its length shortens.
D. It crests.

Answer: A

Question: When the velocity of an ocean wave decreases as it approaches a shore, what happens to the wave?
Answer:


Question: It can take millions of years for fossil fuels to form. These fossil fuels form underground from decaying plants and animals. Which term best describes a fossil fuel?

Choices:
A. a source of solar power
B. a source of electrical power
C. a source of renewable energy
D. a source of nonrenewable energy

Answer: D

Question: It can take millions of years for fossil fuels to form. These fossil fuels form underground from decaying plants and animals. Which term best describes a fossil fuel?
Answer:


Question: A student is collecting water samples. The student needs a container that holds water, will not break easily, and can be used many times. Which of the following containers will best meet the student's needs?

Choices:
A. a glass jar
B. a paper cup
C. a wooden box
D. a plastic bottle

Answer: D

Question: A student is collecting water samples. The student needs a container that holds water, will not break easily, and can be used many times. Which of the following containers will best meet the student's needs?
Answer:


Question: In what unit of time does Earth orbit the Sun?

Choices:
A. day
B. month
C. year
D. century

Answer: C

Question: In what unit of time does Earth orbit the Sun?
Answer:


Question: Electricity is produced in a hydroelectric plant when moving water turns a turbine. Which describes this energy transformation from the turning turbine to electricity?

Choices:
A. kinetic energy into electric energy
B. nuclear energy into electric energy
C. thermal energy into electric energy
D. chemical energy into electric energy

Answer: A

Question: Electricity is produced in a hydroelectric plant when moving water turns a turbine. Which describes this energy transformation from the turning turbine to electricity?
Answer:


Question: At which location does the movement of tectonic plates form isolated volcanic islands, such as Hawaii?

Choices:
A. transform boundary
B. divergent boundary
C. subduction zone
D. hot spot

Answer: D

Question: At which location does the movement of tectonic plates form isolated volcanic islands, such as Hawaii?
Answer:


Question: A plant is discolored and has large brown blotches on its leaves. This condition is most likely caused by

Choices:
A. pollination.
B. photosynthesis.
C. nourishment.
D. disease.

Answer: D

Question: A plant is discolored and has large brown blotches on its leaves. This condition is most likely caused by
Answer:


Question: What is a characteristic of sedimentary rock?

Choices:
A. high hardness
B. glassy texture
C. contains fossils
D. shiny silver luster

Answer: C

Question: What is a characteristic of sedimentary rock?
Answer:


Question: Which is evidence that the universe is expanding?

Choices:
A. the presence of dark matter
B. red shift of light from distant galaxies
C. constant speed of light from every perspective
D. emission of high-energy gamma rays by distant objects

Answer: B

red shift of light from distant galaxies

Question: Which is evidence that the universe is expanding?
Answer:


Question: Heart disease can result in a reduced amount of oxygen moving properly through the body. Which body system does heart disease most directly affect?

Choices:
A. skeletal
B. excretory
C. circulatory
D. nervous

Answer: C

Question: Heart disease can result in a reduced amount of oxygen moving properly through the body. Which body system does heart disease most directly affect?
Answer:


Question: A bird called a ptarmigan has feathered feet. The feathers on the feet of the ptarmigan are most helpful when this bird ___.

Choices:
A. digs up food
B. walks in deep snow
C. climbs rocky cliffs
D. runs under bushes

Answer: B

Question: A bird called a ptarmigan has feathered feet. The feathers on the feet of the ptarmigan are most helpful when this bird ___.
Answer:


Question: What does a fire take away from a forest that squirrels need to survive?

Choices:
A. food and soil
B. food and shelter
C. water and soil
D. water and shelter

Answer: B

Question: What does a fire take away from a forest that squirrels need to survive?
Answer:


Question: Soil color is closely related to its content. Which element causes soil to appear red?

Choices:
A. iron
B. silicon
C. calcium
D. magnesium

Answer: A

Question: Soil color is closely related to its content. Which element causes soil to appear red?
Answer:


Question: Technological advances are allowing scientists to develop methods for replacing abnormal human genes with healthy copies of the same genes. Which is the most likely use for this gene therapy?

Choices:
A. killing viruses
B. healing wounds
C. treatment of airborne infections
D. treatment of inherited diseases

Answer: D

Question: Technological advances are allowing scientists to develop methods for replacing abnormal human genes with healthy copies of the same genes. Which is the most likely use for this gene therapy?
Answer:


Question: Which are replenished more quickly than they are used?

Choices:
A. energy resources
B. material resources
C. renewable resources
D. nonrenewable resources

Answer: C

Question: Which are replenished more quickly than they are used?
Answer:


Question: Fossil fuels are formed

Choices:
A. in shallow areas over short periods of time.
B. from the remains of organisms.
C. in underground reservoirs that are relatively cool.
D. by high winds and temperatures.

Answer: B

Question: Fossil fuels are formed
Answer:


Question: Which of these situations would most likely be a result of climate change?

Choices:
A. weaker storms, causing less shoreline erosion
B. shorter days, causing longer hibernation periods
C. shrinking glaciers, causing sea levels to rise
D. increased radioactivity, causing damage to cells

Answer: C

shrinking glaciers, causing sea levels to rise

Question: Which of these situations would most likely be a result of climate change?
Answer:


Question: The human body is made up of different levels of organization. A tissue is a group of cells that work together to perform a specific function. Which would be an example of a tissue in the human body?

Choices:
A. stomach
B. platelets
C. muscle
D. hair

Answer: C

Question: The human body is made up of different levels of organization. A tissue is a group of cells that work together to perform a specific function. Which would be an example of a tissue in the human body?
Answer:


Question: Which scientist hypothesized that the environment can affect the characteristics of a species?

Choices:
A. Darwin
B. Einstein
C. Mendel
D. Newton

Answer: A

Question: Which scientist hypothesized that the environment can affect the characteristics of a species?
Answer:


Question: How do the circulatory system and the respiratory system depend on one another?

Choices:
A. Oxygen collected by the respiratory system is carried throughout the body by the circulatory system.
B. Solid wastes collected by the circulatory system are carried throughout the body by the respiratory system.
C. Nutrients collected by the respiratory system are carried throughout the body by the circulatory system.
D. Carbon dioxide collected by the circulatory system is carried throughout the body by the respiratory system.

Answer: A

Oxygen collected by the respiratory system is carried throughout the body by the circulatory system.

Question: How do the circulatory system and the respiratory system depend on one another?
Answer:


Question: A shift in climate changes a forested area with little annual snowfall to an area with snowfall most of the year. Natural selection would most likely favor a rabbit with which adaptation?

Choices:
A. dark coat color
B. increased body fat
C. large ears to release body heat
D. more powerful legs for burrowing

Answer: B

Question: A shift in climate changes a forested area with little annual snowfall to an area with snowfall most of the year. Natural selection would most likely favor a rabbit with which adaptation?
Answer:


Question: Which of these steps in the rock cycle occurs ONLY in the formation of metamorphic rock?

Choices:
A. erosion
B. compaction
C. cementation
D. recrystallization

Answer: D

Question: Which of these steps in the rock cycle occurs ONLY in the formation of metamorphic rock?
Answer:


Question: The sun provides heat and light to Earth. The sun is best described as

Choices:
A. a planet close to Earth
B. the closest star to Earth
C. a planet that reflects light
D. the center of the universe

Answer: B

Question: The sun provides heat and light to Earth. The sun is best described as
Answer:


Question: Which process is the best example of weathering?

Choices:
A. A cloud releases freezing rain.
B. A tree root breaks apart a rock.
C. Dry weather results in a small harvest.
D. Sediments flow into a bay.

Answer: B

Question: Which process is the best example of weathering?
Answer:


Question: Ned learned that light is a source of energy. Which can only result from light energy?

Choices:
A. an ice cube melting
B. a rainbow forming
C. water evaporating
D. thunder booming

Answer: B

Question: Ned learned that light is a source of energy. Which can only result from light energy?
Answer:


Question: Some dairy farmers want their cows to produce greater amounts of milk than average cows. Which process will help the dairy farmers develop cows with this trait?

Choices:
A. selective breeding
B. behavioral modification
C. ecological succession
D. geographical isolation

Answer: A

Question: Some dairy farmers want their cows to produce greater amounts of milk than average cows. Which process will help the dairy farmers develop cows with this trait?
Answer:


Question: Which of these features, formed east of the Sierra Nevada Mountain Range, is due to moist air rising along the western slope of the mountain range?

Choices:
A. desert
B. grassland
C. rain forest
D. temperate forest

Answer: A

Question: Which of these features, formed east of the Sierra Nevada Mountain Range, is due to moist air rising along the western slope of the mountain range?
Answer:


Question: Which source of energy is nonrenewable?

Choices:
A. coal
B. sunlight
C. water
D. wood

Answer: A

Question: Which source of energy is nonrenewable?
Answer:


Question: A researcher is measuring changes in the density of the upper atmosphere over time. Which units should be used for the density measurements?

Choices:
A. kg/s
B. m^3/s
C. L/m^3
D. kg/m^3

Answer: D

Question: A researcher is measuring changes in the density of the upper atmosphere over time. Which units should be used for the density measurements?
Answer:


Question: Which of the following is a characteristic of the "steady state theory" of the universe?

Choices:
A. The universe is constantly growing and changing.
B. A great explosion caused the origin of the universe.
C. The nature of the universe has always been the same.
D. Light moving from the center of the universe appears red.

Answer: C

The nature of the universe has always been the same.

Question: Which of the following is a characteristic of the "steady state theory" of the universe?
Answer:


Question: Which observation provides evidence of the existence of planets orbiting other stars?

Choices:
A. periodic dimming of the stars
B. periodic X-ray bursts from the stars
C. rapid location changes of the stars
D. regular spectrum changes from the stars

Answer: A

Question: Which observation provides evidence of the existence of planets orbiting other stars?
Answer:


Question: Meadow voles are small mouse-like animals that eat plants and insects. Their niche in an ecosystem is a

Choices:
A. omnivore.
B. herbivore.
C. producer.
D. scavenger.

Answer: A

Question: Meadow voles are small mouse-like animals that eat plants and insects. Their niche in an ecosystem is a
Answer:


Question: Hawaii is composed mainly of volcanoes with gentle slopes and large surface areas. Which characteristics best describe the lava these volcanoes have released?

Choices:
A. relatively fluid and low viscosity
B. highly viscous and relatively cool
C. mix of hot gas and rock shards
D. mainly water vapor and large boulders

Answer: A

Question: Hawaii is composed mainly of volcanoes with gentle slopes and large surface areas. Which characteristics best describe the lava these volcanoes have released?
Answer:


Question: Which of the following has changed over the last 200 years primarily due to human activity?

Choices:
A. Earth's magnetic field
B. the frequency of earthquakes
C. Earth's tectonic plate activity
D. the composition of the atmosphere

Answer: D

Question: Which of the following has changed over the last 200 years primarily due to human activity?
Answer:


Question: Which event is the best example of competition between species in a pond environment?

Choices:
1. dragonflies landing on lily pads
2. frogs and toads eating flies
3. lizards and snakes lying in the sun
4. hawks eating mice

Answer: 2

Question: Which event is the best example of competition between species in a pond environment?
Answer:


Question: Solids, liquids, and gases are all different states of which of the following?

Choices:
A. mass
B. matter
C. weight
D. volume

Answer: B

Question: Solids, liquids, and gases are all different states of which of the following?
Answer:


Question: In the Adirondack forests of New York, some trees have died. The change in the forest is thought to be related to air pollution and rain. Which abiotic factor most likely has been changed as a result of the pollution and rain which resulted in the death of the trees?

Choices:
A. a decrease in the amount of available oxygen
B. an increase in the amount of sunlight
C. a decrease in the pH of the soil
D. an increase in the nutrients

Answer: C

Question: In the Adirondack forests of New York, some trees have died. The change in the forest is thought to be related to air pollution and rain. Which abiotic factor most likely has been changed as a result of the pollution and rain which resulted in the death of the trees?
Answer:


Question: A galaxy is best described as a cluster of

Choices:
A. hundreds of stars.
B. thousands of stars.
C. millions of stars.
D. billions of stars.

Answer: D

Question: A galaxy is best described as a cluster of
Answer:


Question: A student plans to write a report about a type of bird that includes only facts. Which statement should the student leave out of the report?

Choices:
A. These birds are blue.
B. These birds are beautiful.
C. Most of these birds are 13 cm tall.
D. Most of these birds are about 10 grams.

Answer: B

Question: A student plans to write a report about a type of bird that includes only facts. Which statement should the student leave out of the report?
Answer:


Question: A student is trying to model an ocean environment. What is the most important factor the student should add to the aquarium in order to make sure that the model is accurate?

Choices:
A. starfish
B. seaweed
C. salt water
D. coral reef

Answer: C

Question: A student is trying to model an ocean environment. What is the most important factor the student should add to the aquarium in order to make sure that the model is accurate?
Answer:


Question: Which of these is defined as "the passage of genetic instructions from one generation to the next?"

Choices:
A. growth
B. heredity
C. development
D. reproduction

Answer: B

Question: Which of these is defined as "the passage of genetic instructions from one generation to the next?"
Answer:


Question: MOST of the volcanoes that make up the "Ring of Fire" were formed near

Choices:
A. hot spots.
B. subduction zones.
C. divergent boundaries.
D. normal faults.

Answer: B

Question: MOST of the volcanoes that make up the "Ring of Fire" were formed near
Answer:


Question: What form of energy makes a compass needle point north?

Choices:
A. electrical
B. heat
C. light
D. magnetic

Answer: D

Question: What form of energy makes a compass needle point north?
Answer:


Question: Which energy source might involve burning wood or producing gasohol?

Choices:
A. biomass
B. wind turbine
C. nuclear fission
D. hydroelectric power

Answer: A

Question: Which energy source might involve burning wood or producing gasohol?
Answer:


Question: Over a two-week period, several students complain of feeling sick. Their symptoms include a cough, fever, and a sore throat. What describes the most likely cause of these symptoms?

Choices:
A. exposure to hot weather
B. decrease in physical exercise
C. consumption of bad food
D. infection by a virus

Answer: D

Question: Over a two-week period, several students complain of feeling sick. Their symptoms include a cough, fever, and a sore throat. What describes the most likely cause of these symptoms?
Answer:


Question: Which of the following will always produce a magnetic force on a nearby iron nail?

Choices:
A. a long piece of copper wire
B. a large static electric charge
C. an electric current
D. an electric field

Answer: C

Question: Which of the following will always produce a magnetic force on a nearby iron nail?
Answer:


Question: A student sees a bird at a feeder. The student identifies the bird as a sparrow. Which organ system did the student use to identify the bird?

Choices:
A. circulatory
B. muscular
C. nervous
D. skeletal

Answer: C

Question: A student sees a bird at a feeder. The student identifies the bird as a sparrow. Which organ system did the student use to identify the bird?
Answer:


Question: The Moon's rotation is

Choices:
A. faster than its revolution.
B. slower than its revolution.
C. half as fast as its revolution.
D. about the same as its revolution.

Answer: D

Question: The Moon's rotation is
Answer:


Question: What is the name of the author who proposed natural selection as the mechanism of evolution?

Choices:
A. Mendel
B. Darwin
C. Lamarck
D. Hardy-Weinberg

Answer: B

Question: What is the name of the author who proposed natural selection as the mechanism of evolution?
Answer:


Question: Which do meteorologists use to measure the amount of precipitation that falls during a storm?

Choices:
A. Anemometer
B. Barometer
C. Rain gauge
D. Weather vane

Answer: C

Question: Which do meteorologists use to measure the amount of precipitation that falls during a storm?
Answer:


Question: The driver of a car at a railroad crossing hears a change in pitch of the train whistle as the train passes by. This change in pitch is most likely due to

Choices:
A. the Doppler effect.
B. the Compton effect.
C. a change in medium.
D. a change in speed.

Answer: A

Question: The driver of a car at a railroad crossing hears a change in pitch of the train whistle as the train passes by. This change in pitch is most likely due to
Answer:


Question: Which is most likely a genetic adaptation of desert plants to survive the hot, dry climate conditions?

Choices:
A. thin bark
B. waxy leaves
C. leaves that remain all year
D. flowers that bloom all year

Answer: B

Question: Which is most likely a genetic adaptation of desert plants to survive the hot, dry climate conditions?
Answer:


Question: A dog growls when a predator gets close. Growling is an example of which animal behavior?

Choices:
A. migration
B. hibernation
C. communication
D. germination

Answer: C

Question: A dog growls when a predator gets close. Growling is an example of which animal behavior?
Answer:


Question: A paramecium is an example of

Choices:
A. a single-celled organism.
B. multiple organisms.
C. an inorganic substance.
D. a group of cells.

Answer: A

Question: A paramecium is an example of
Answer:


Question: Which plant part is described correctly?

Choices:
A. Stems make seeds.
B. Roots absorb nutrients.
C. Leaves absorb water.
D. Flowers make food.

Answer: B

Question: Which plant part is described correctly?
Answer:


Question: Which trait is common in gases that contribute to Earth's greenhouse effect?

Choices:
A. the ability to trap heat
B. a tendency to lose electrons
C. a tendency to exist as diatomic molecules
D. the ability to bond with multiple other elements

Answer: A

Question: Which trait is common in gases that contribute to Earth's greenhouse effect?
Answer:


Question: Which form of energy is produced when a rubber band vibrates?

Choices:
1. chemical
2. light
3. electrical
4. sound

Answer: 4

Question: Which form of energy is produced when a rubber band vibrates?
Answer:


Question: The length of a year on Earth is a little over 365 days. The length of a year on a planet is best described as the time it takes for which to occur?

Choices:
A. the planet to revolve once around the Sun
B. the seasons to complete a full cycle
C. the planet to rotate once on its axis
D. the Sun to rotate once on its axis

Answer: A

the planet to revolve once around the Sun

Question: The length of a year on Earth is a little over 365 days. The length of a year on a planet is best described as the time it takes for which to occur?
Answer:


Question: The house cat was believed to be tamed in ancient Egypt. In 2004, the remains of an eight-month old cat buried with its owner were discovered on the Mediterranean island of Cyprus. The date of burial, however, came before Egyptian civilization. Which best explains the importance of the discovery?

Choices:
A. Wildcats are not related to house cats.
B. Cats were domesticated earlier than originally thought.
C. Wildcats were not domesticated.
D. The period of Egyptian civilization was older than originally thought.

Answer: B

Cats were domesticated earlier than originally thought.

Question: The house cat was believed to be tamed in ancient Egypt. In 2004, the remains of an eight-month old cat buried with its owner were discovered on the Mediterranean island of Cyprus. The date of burial, however, came before Egyptian civilization. Which best explains the importance of the discovery?
Answer:


Question: A hiker wants to know if air is warmer in a forest than in the nearby farm field. Which activity would best help the hiker find out which area is warmer?

Choices:
A. reading a book about farm fields
B. making a weather prediction for the forests
C. measuring the wind speed at both locations
D. recording the temperatures at both locations

Answer: D

recording the temperatures at both locations

Question: A hiker wants to know if air is warmer in a forest than in the nearby farm field. Which activity would best help the hiker find out which area is warmer?
Answer:


Question: The body is made up of many systems that interact with one another. For example, the skeletal system and the muscular system work together to help the body move. Which system works with the respiratory system to distribute oxygen to the body?

Choices:
A. muscular system
B. digestive system
C. lymphatic system
D. circulatory system

Answer: D

Question: The body is made up of many systems that interact with one another. For example, the skeletal system and the muscular system work together to help the body move. Which system works with the respiratory system to distribute oxygen to the body?
Answer:


Question: Which part of a plant helps the plant make food from sunlight?

Choices:
A. leaf
B. seed
C. fruit
D. pollen

Answer: A

Question: Which part of a plant helps the plant make food from sunlight?
Answer:


Question: Which of the following is produced when two or more elements combine in a chemical reaction?

Choices:
A. atom
B. compound
C. mixture
D. solution

Answer: B

Question: Which of the following is produced when two or more elements combine in a chemical reaction?
Answer:


Question: Centuries ago, people used their knowledge of the stars to

Choices:
A. navigate ships.
B. study the weather.
C. predict volcanic eruptions.
D. map the Earth's surface.

Answer: A

Question: Centuries ago, people used their knowledge of the stars to
Answer:


Question: Animals get the energy they need for growth and repair by

Choices:
A. eating food
B. absorbing sunlight
C. eliminating waste
D. drinking water

Answer: A

Question: Animals get the energy they need for growth and repair by
Answer:


Question: A class made a solar cooker out of a large can. What color should they paint the can in order to collect the most heat?

Choices:
A. black
B. green
C. pink
D. white

Answer: A

Question: A class made a solar cooker out of a large can. What color should they paint the can in order to collect the most heat?
Answer:


Question: In the 16005 Robert Hooke invented an improved type of microscope. Which of these was a direct result of this invention?

Choices:
A. The first view of atoms and molecules
B. Detailed observations of Jupiter and Mars
C. The name spectrum for the colors of light
D. The term cell to describe the smallest unit of life

Answer: D

The term cell to describe the smallest unit of life

Question: In the 16005 Robert Hooke invented an improved type of microscope. Which of these was a direct result of this invention?
Answer:


Question: Earth can be viewed as an engine and heat exchange is part of the engine system. Which would be an example of a transfer of energy from the atmosphere to the lithosphere?

Choices:
A. A volcano erupts in the state of Washington.
B. An earthquake takes place off the coast of Japan.
C. A wild fire scorches a prairie in the upper Midwest.
D. A hurricane moves from the Gulf of Mexico onto land.

Answer: D

A hurricane moves from the Gulf of Mexico onto land.

Question: Earth can be viewed as an engine and heat exchange is part of the engine system. Which would be an example of a transfer of energy from the atmosphere to the lithosphere?
Answer:


Question: The sum of all chemical reactions that take place within an organism is known as

Choices:
1. evolution
2. metabolism
3. circulation
4. reproduction

Answer: 2

Question: The sum of all chemical reactions that take place within an organism is known as
Answer:


Question: Your community is planning to build a new sanitary landfill. In locating the landfill, which is the most important environmental consideration?

Choices:
A. the cost of the land
B. the location of the groundwater
C. the proximity to an industrial park
D. the accessibility to a major highway

Answer: B

Question: Your community is planning to build a new sanitary landfill. In locating the landfill, which is the most important environmental consideration?
Answer:


Question: In the 20th century, Edwin Hubble deduced from observations that there are galaxies other than the Milky Way. Hubble's observations depended on improvements in a technology first developed by which scientist?

Choices:
A. Democritus
B. Isaac Newton
C. Galileo Galilei
D. Anton Van Leeuwenhoek

Answer: C

Question: In the 20th century, Edwin Hubble deduced from observations that there are galaxies other than the Milky Way. Hubble's observations depended on improvements in a technology first developed by which scientist?
Answer:


Question: Air that travels away from the equator fails to maintain a straight path. The path of the air is deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. The apparent deflection of air to either the right or left is known as the Coriolis Effect. Which factor produces the Coriolis Effect?

Choices:
A. the gravity of Earth
B. the rotation of Earth
C. the axial tilt of Earth
D. the revolution of Earth

Answer: B

Question: Air that travels away from the equator fails to maintain a straight path. The path of the air is deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. The apparent deflection of air to either the right or left is known as the Coriolis Effect. Which factor produces the Coriolis Effect?
Answer:


Question: Glaciers cover about 10% of the total land area on Earth. The role of glaciers in the water cycle is to

Choices:
A. filter salt water
B. store fresh water
C. move liquid water
D. precipitate solid water

Answer: B

Question: Glaciers cover about 10% of the total land area on Earth. The role of glaciers in the water cycle is to
Answer:


Question: A student uses a fan and a box of sand to model the formation of sand dunes. This model shows the effect of which natural factor on the landscape?

Choices:
A. wind
B. water
C. temperature
D. gravity

Answer: A

Question: A student uses a fan and a box of sand to model the formation of sand dunes. This model shows the effect of which natural factor on the landscape?
Answer:


Question: When mining for coal, a mining company removes the plants and layers of soil and rock above the coal deposit, and takes the coal. When the operation is complete, the mining company returns soil and rock, covers it with a layer of topsoil, and plants trees and grass. The trees and grass help to

Choices:
A. prevent a collapse of the underlying sediment.
B. limit the types of pollutants that can enter the soil.
C. increase water absorption by the replaced sediments.
D. reduce soil erosion and provide new habitat for animals.

Answer: D

reduce soil erosion and provide new habitat for animals.

Question: When mining for coal, a mining company removes the plants and layers of soil and rock above the coal deposit, and takes the coal. When the operation is complete, the mining company returns soil and rock, covers it with a layer of topsoil, and plants trees and grass. The trees and grass help to
Answer:


Question: When a tree is dormant, the tree is

Choices:
A. dying
B. inactive
C. growing taller
D. growing its leaves

Answer: B

Question: When a tree is dormant, the tree is
Answer:


Question: Clouds are formed from tiny drops of water that are light enough to float in the air. As these drops bump into each other, they form larger drops. What happens when these drops become too heavy to float in the air?

Choices:
A. The drops form fog.
B. The drops evaporate.
C. The drops fall as rain.
D. The drops become air.

Answer: C

Question: Clouds are formed from tiny drops of water that are light enough to float in the air. As these drops bump into each other, they form larger drops. What happens when these drops become too heavy to float in the air?
Answer:


Question: Which activity is an important function of nucleases?

Choices:
A. repairing the double strand of DNA
B. concentrating RNA into a nucleolus
C. maintaining homeostasis of nucleoplasm
D. dissolving the nuclear membrane during mitosis

Answer: A

Question: Which activity is an important function of nucleases?
Answer:


Question: The early Greeks are credited with many valid concepts in astronomy. Some of their theories were correct; some were later proven incorrect. One theory was that Earth was the center of the universe and that other planets circled Earth. The Greeks thought Earth did not move because its movement was not obvious from the surface of the planet. The Greeks also believed that an invisible sphere surrounding our planet contained the stars. This sphere rotated, explaining the apparent movement of constellations over time. Early Greeks also developed theories about the relationship between the moon and Earth. Why is the same side of the moon always visible from Earth?

Choices:
A. The far side of the moon does not reflect sunlight.
B. The moon stays in one location while Earth revolves around it.
C. The period of rotation and the period of revolution for the moon are about the same.
D. The moon rotates clockwise on its axis while Earth rotates counterclockwise on its axis.

Answer: C

The period of rotation and the period of revolution for the moon are about the same.

Question: The early Greeks are credited with many valid concepts in astronomy. Some of their theories were correct; some were later proven incorrect. One theory was that Earth was the center of the universe and that other planets circled Earth. The Greeks thought Earth did not move because its movement was not obvious from the surface of the planet. The Greeks also believed that an invisible sphere surrounding our planet contained the stars. This sphere rotated, explaining the apparent movement of constellations over time. Early Greeks also developed theories about the relationship between the moon and Earth. Why is the same side of the moon always visible from Earth?
Answer:


Question: Nicole is learning about the characteristics of different vertebrates. Which is a common characteristic of mammals?

Choices:
A. They all live on land.
B. They all have hair or fur.
C. They are all good swimmers.
D. They all live in warm climates.

Answer: B

Question: Nicole is learning about the characteristics of different vertebrates. Which is a common characteristic of mammals?
Answer:


Question: The formation of the Grand Canyon has most likely taken how long?

Choices:
A. several years
B. hundreds of years
C. thousands of years
D. millions of years

Answer: D

Question: The formation of the Grand Canyon has most likely taken how long?
Answer:


Question: Which statement is true?

Choices:
A. All fungi are multicellular heterotrophs.
B. All fungi are single-celled heterotrophs.
C. All animals are multicellular heterotrophs.
D. All animals are single-celled heterotrophs.

Answer: C

All animals are multicellular heterotrophs.

Question: Which statement is true?
Answer:


Question: High average daily temperature and heavy annual precipitation are found in a

Choices:
A. desert.
B. grassland.
C. rainforest.
D. tundra.

Answer: C

Question: High average daily temperature and heavy annual precipitation are found in a
Answer:


Question: Visible light in the electromagnetic spectrum

Choices:
A. is a broad band within the spectrum.
B. is a narrow band within the spectrum.
C. makes up 50 percent of the spectrum.
D. makes up more than 75 percent of the spectrum.

Answer: B

Question: Visible light in the electromagnetic spectrum
Answer:


Question: Which characteristic of an element determines its placement in the periodic table?

Choices:
A. mass
B. size
C. number of neutrons
D. number of protons

Answer: D

Question: Which characteristic of an element determines its placement in the periodic table?
Answer:


Question: Which type of adaptation allows an animal to deceive its predator?

Choices:
A. large size
B. protective coloration
C. scent glands
D. leathery skin

Answer: B

Question: Which type of adaptation allows an animal to deceive its predator?
Answer:


Question: How would the woodpecker population in a forest area most likely be affected if a housing development is built in that area?

Choices:
A. They would produce more offspring.
B. They would change the color of their feathers.
C. They would experience a decrease in available food.
D. They would experience a decrease in competition.

Answer: C

They would experience a decrease in available food.

Question: How would the woodpecker population in a forest area most likely be affected if a housing development is built in that area?
Answer:


Question: An octopus releases black ink into the water when feeling threatened. What does this most likely help an octopus do?

Choices:
A. find shelter
B. hunt for food
C. swim faster
D. escape enemies

Answer: D

Question: An octopus releases black ink into the water when feeling threatened. What does this most likely help an octopus do?
Answer:


Question: How is a telephone able to transmit sound?

Choices:
A. It conducts vibrations from speaker to receiver.
B. It magnifies a person's voice.
C. It carries the sounds through wires.
D. It converts vibrations to electrical signals.

Answer: D

It converts vibrations to electrical signals.

Question: How is a telephone able to transmit sound?
Answer:


Question: Which substance is necessary for burning to take place?

Choices:
A. ozone
B. oxygen
C. hydrogen
D. carbon dioxide

Answer: B

Question: Which substance is necessary for burning to take place?
Answer:


Question: The winter solstice occurs on either December 21 or 22, depending on the year. Which of the following statements best explains why the time of the year the winter solstice occurs has the least amount of daylight in Massachusetts?

Choices:
A. Earth is farthest away from the Sun on the winter solstice.
B. Earth's rotational speed on its axis is greatest on the winter solstice.
C. Earth is traveling around the Sun with the greatest speed on the winter solstice.
D. Earth's Northern Hemisphere is tilted away from the Sun on the winter solstice.

Answer: D

Earth's Northern Hemisphere is tilted away from the Sun on the winter solstice.

Question: The winter solstice occurs on either December 21 or 22, depending on the year. Which of the following statements best explains why the time of the year the winter solstice occurs has the least amount of daylight in Massachusetts?
Answer:


Question: Daphnee is going to build a model of the solar system for her science project. She decides that a meter (m) will represent one astronomical unit (AU) in her model. Based on this scale, how far away from the Sun would she need to place Earth?

Choices:
A. one meter
B. two meters
C. three meters
D. four meters

Answer: A

Question: Daphnee is going to build a model of the solar system for her science project. She decides that a meter (m) will represent one astronomical unit (AU) in her model. Based on this scale, how far away from the Sun would she need to place Earth?
Answer:


Question: In humans, B is the allele for brown eyes and b is the allele for blue eyes. Two brothers both have brown eyes, but one of them has both the B and b alleles while the other only has B alleles. Which statement is true about the brothers?

Choices:
A. They have the same genotype and phenotype.
B. They have different phenotypes and genotypes.
C. They have the same phenotype but different genotypes.
D. They have the same genotype but different phenotypes.

Answer: C

They have the same phenotype but different genotypes.

Question: In humans, B is the allele for brown eyes and b is the allele for blue eyes. Two brothers both have brown eyes, but one of them has both the B and b alleles while the other only has B alleles. Which statement is true about the brothers?
Answer:


Question: Tectonic motion caused tension between plates in Earth's crust. A sudden release of this energy occurred. Based on this information, which event happened?

Choices:
A. subsidence
B. earthquake
C. volcanic eruption
D. meteoroid impact

Answer: B

Question: Tectonic motion caused tension between plates in Earth's crust. A sudden release of this energy occurred. Based on this information, which event happened?
Answer:


Question: The length of a year is determined by the amount of time it takes

Choices:
A. the Moon to revolve around Earth.
B. Earth to revolve around the Sun.
C. Earth to rotate on its axis.
D. the Sun to rotate on its axis.

Answer: B

Question: The length of a year is determined by the amount of time it takes
Answer:


Question: Hurricanes are driven by the energy they get from ocean water. Which property of water allows it to retain the energy needed to power a hurricane?

Choices:
A. low vapor pressure
B. high specific heat
C. high surface tension
D. low freezing point

Answer: B

Question: Hurricanes are driven by the energy they get from ocean water. Which property of water allows it to retain the energy needed to power a hurricane?
Answer:


Question: Which environment would most likely have rich, fertile soil?

Choices:
A. a desert plain
B. a coastal beach
C. a mountain peak
D. a flood plain

Answer: D

Question: Which environment would most likely have rich, fertile soil?
Answer:


Question: How do people get energy and nutrients?

Choices:
A. breathing clean air
B. exercising and playing
C. getting plenty of rest
D. eating healthy food

Answer: D

Question: How do people get energy and nutrients?
Answer:


Question: Which information will best help scientists determine if an object is a comet, an asteroid, or a meteoroid?

Choices:
A. the object's diameter
B. the object's composition
C. the shape of the object's orbit
D. the speed at which the object travels

Answer: B

Question: Which information will best help scientists determine if an object is a comet, an asteroid, or a meteoroid?
Answer:


Question: Which of these best describes a fossil?

Choices:
A. a geometric pattern formed by a mineral
B. a solid element or compound from Earth's crust
C. remains of an extinct organism found in a rock layer
D. bits of weathered rocks and pieces of dead organisms

Answer: C

remains of an extinct organism found in a rock layer

Question: Which of these best describes a fossil?
Answer:


Question: Which scientist would be most likely to study the changes in animal populations in nature?

Choices:
A. Botanist
B. Engineer
C. Ecologist
D. Veterinarian

Answer: C

Question: Which scientist would be most likely to study the changes in animal populations in nature?
Answer:


Question: Which statement best explains the reason that electrical wires are made of copper?

Choices:
A. Copper is strong.
B. Copper is flexible.
C. Copper is a conductor.
D. Copper is an insulator.

Answer: C

Question: Which statement best explains the reason that electrical wires are made of copper?
Answer:


Question: How does the presence of organic matter contribute to good soil?

Choices:
A. It adds nutrients to the soil.
B. It helps the soil to dry out.
C. It keeps the soil cool.
D. It destroys bacteria in the soil.

Answer: A

Question: How does the presence of organic matter contribute to good soil?
Answer:


Question: The average car uses about 25% of the available energy in each gallon of gasoline. The energy not used to run the car is released as heat and sound. Which statement best describes this occurrence?

Choices:
A. Energy conversion reduces efficiency.
B. Energy is destroyed at high temperatures.
C. Energy loss increases the order in a system.
D. Energy levels increase as conversions take place.

Answer: A

Question: The average car uses about 25% of the available energy in each gallon of gasoline. The energy not used to run the car is released as heat and sound. Which statement best describes this occurrence?
Answer:


Question: In which type of rock is the fossil imprint of a fern leaf most likely to be found?

Choices:
1. igneous
2. metamorphic
3. sedimentary
4. volcanic

Answer: 3

Question: In which type of rock is the fossil imprint of a fern leaf most likely to be found?
Answer:


Question: Ferns belong to any one of about 12,000 species of plants grouped in their own division within the plant kingdom. Ferns are vascular, seedless, flowerless, and reproduce by spores. To which plant group do ferns belong?

Choices:
A. Bryophyta
B. Gymnosperm
C. Angiosperm
D. Pteridophyta

Answer: D

Question: Ferns belong to any one of about 12,000 species of plants grouped in their own division within the plant kingdom. Ferns are vascular, seedless, flowerless, and reproduce by spores. To which plant group do ferns belong?
Answer:


Question: Which number is closest to the estimated number of stars in the Milky Way galaxy?

Choices:
A. 200 thousand
B. 200 million
C. 200 billion
D. 200 trillion

Answer: C

Question: Which number is closest to the estimated number of stars in the Milky Way galaxy?
Answer:


Question: Some objects are attracted by magnets. Which object is attracted by a magnet?

Choices:
A. an iron nail
B. an ice cube
C. a plastic knife
D. a wooden ruler

Answer: A

Question: Some objects are attracted by magnets. Which object is attracted by a magnet?
Answer:


Question: The density of 200 mL of water was determined, and then 20 grams of sugar was dissolved in the water. The student determined the density of the sugar-water solution and recorded the collected data in a table. The sugar in this investigation is

Choices:
A. the solute.
B. undergoing chemical change.
C. the solvent.
D. changing from a solid to a gas.

Answer: A

Question: The density of 200 mL of water was determined, and then 20 grams of sugar was dissolved in the water. The student determined the density of the sugar-water solution and recorded the collected data in a table. The sugar in this investigation is
Answer:


Question: Heat is applied to a beaker of water, raising the water temperature a few degrees. What happens to the water molecules after heat is applied?

Choices:
A. The molecules spread apart and move more slowly.
B. The molecules spread apart and move more quickly.
C. The molecules come together and move more slowly.
D. The molecules come together and move more quickly.

Answer: B

The molecules spread apart and move more quickly.

Question: Heat is applied to a beaker of water, raising the water temperature a few degrees. What happens to the water molecules after heat is applied?
Answer:


Question: A student must explain the role of dead leaves in the ecosystem. Which statement will the student most likely provide to explain the importance of these leaves?

Choices:
A. The leaves provide shelter to growing seeds.
B. The decay of the leaves provides nutrients to other plants.
C. The leaves release chlorophyll into the grass as they decay.
D. The leaves prevent fungus from growing at the base of the tree.

Answer: B

The decay of the leaves provides nutrients to other plants.

Question: A student must explain the role of dead leaves in the ecosystem. Which statement will the student most likely provide to explain the importance of these leaves?
Answer:


Question: Which of the following is an example of an acidic solution?

Choices:
A. bleach
B. vinegar
C. sugar water
D. salt water

Answer: B

Question: Which of the following is an example of an acidic solution?
Answer:


Question: Which of the following was most likely the cause of the extinction of 60-100 species of native birds in Hawaii since the arrival of colonists?

Choices:
A. habitat destruction
B. volcanic eruptions
C. increased salinity
D. tidal waves

Answer: A

Question: Which of the following was most likely the cause of the extinction of 60-100 species of native birds in Hawaii since the arrival of colonists?
Answer:


Question: Which list gives the correct order of food traveling through the digestive system after it is swallowed?

Choices:
A. stomach, esophagus, large intestine, small intestine.
B. small intestine, large intestine, esophagus, stomach.
C. esophagus, stomach, large intestine, small intestine.
D. esophagus, stomach, small intestine, large intestine.

Answer: D

esophagus, stomach, small intestine, large intestine.

Question: Which list gives the correct order of food traveling through the digestive system after it is swallowed?
Answer:


Question: What allows for some organisms in a population to have an increased survival rate over other organisms of the same species?

Choices:
A. genetic mutation
B. species competition
C. asexual reproduction
D. genetic variation

Answer: D

Question: What allows for some organisms in a population to have an increased survival rate over other organisms of the same species?
Answer:


Question: Rheumatoid arthritis is an autoimmune disease that affects the joints. Which of these events causes the symptoms of this disease?

Choices:
A. The body's immune system attacks specific tissues.
B. The cells of the immune system begin to grow rapidly.
C. The body's immune system fails to fight off infections.
D. The cells of the immune system are absorbed by antigens.

Answer: A

The body's immune system attacks specific tissues.

Question: Rheumatoid arthritis is an autoimmune disease that affects the joints. Which of these events causes the symptoms of this disease?
Answer:


Question: An unusual type of fossil clam is found in rock layers high in the Swiss Alps. The same type of fossil clam is also found in the Rocky Mountains of North America. From this, scientists conclude that

Choices:
A. glaciers carried the fossils up the mountains
B. the Rocky Mountains and the Swiss Alps are both volcanic in origin
C. clams once lived in mountains, but have since evolved into sea-dwelling creatures
D. the layers of rocks in which the fossils were found are from the same geologic age

Answer: D

the layers of rocks in which the fossils were found are from the same geologic age

Question: An unusual type of fossil clam is found in rock layers high in the Swiss Alps. The same type of fossil clam is also found in the Rocky Mountains of North America. From this, scientists conclude that
Answer:


Question: Which of these is an example of a new substance being formed?

Choices:
A. a nail rusting
B. a wall being painted
C. water changing to steam
D. paper being folded

Answer: A

Question: Which of these is an example of a new substance being formed?
Answer:


Question: Years ago, most family members lived near one another. Today, family members often live all over the country. People are able to live far from their loved ones because of the technologies of

Choices:
A. medicine and computers.
B. manufacturing and home entertainment.
C. refrigeration and heating systems.
D. communication and transportation.

Answer: D

Question: Years ago, most family members lived near one another. Today, family members often live all over the country. People are able to live far from their loved ones because of the technologies of
Answer:


Question: When performing a new experiment for the first time, a scientist reaches an unexpected conclusion. What must the scientist do in order to have the conclusion accepted by other scientists?

Choices:
A. write a brief report
B. repeat the experiment
C. purchase new equipment
D. make a data chart

Answer: B

Question: When performing a new experiment for the first time, a scientist reaches an unexpected conclusion. What must the scientist do in order to have the conclusion accepted by other scientists?
Answer:


Question: A negatively charged rubber rod was brought near some small pieces of paper. The rod's charges repelled the negative charges in the pieces. Which of the following caused the repulsion of the negative charges?

Choices:
A. conduction
B. gravitation
C. induction
D. insulation

Answer: C

Question: A negatively charged rubber rod was brought near some small pieces of paper. The rod's charges repelled the negative charges in the pieces. Which of the following caused the repulsion of the negative charges?
Answer:


Question: Scientists are able to conclude that a forested ecosystem existed in Antarctica millions of years ago by studying

Choices:
A. the current climate.
B. the fossil record.
C. glacial movement.
D. seafloor spreading.

Answer: B

Question: Scientists are able to conclude that a forested ecosystem existed in Antarctica millions of years ago by studying
Answer:


Question: In which example does an object move because of the force of gravity?

Choices:
A. a girl hitting a ball with a bat
B. a boy pushing a box across the floor
C. a girl hammering a nail into a wall
D. a boy falling from a tree onto the ground

Answer: D

a boy falling from a tree onto the ground

Question: In which example does an object move because of the force of gravity?
Answer:


Question: In living organisms, the level of organization from least complex to most complex is

Choices:
A. cell, tissue, organ, organism
B. cell, organ, tissue, organism
C. tissue, cell, organ, organism
D. tissue, organ, cell, organism

Answer: A

Question: In living organisms, the level of organization from least complex to most complex is
Answer:


Question: Which term best describes the process responsible for cave formation that results from rock being dissolved by groundwater?

Choices:
A. chemical weathering
B. glacial movement
C. sedimentation
D. abrasion

Answer: A

Question: Which term best describes the process responsible for cave formation that results from rock being dissolved by groundwater?
Answer:


Question: Ruben is using a compass to find out which direction the wind is blowing. Which of the following would be best for him to observe to help him find the direction of the wind?

Choices:
A. a flag on a pole
B. the temperature on a thermometer
C. birds flying above the trees
D. the shadow of a building

Answer: A

Question: Ruben is using a compass to find out which direction the wind is blowing. Which of the following would be best for him to observe to help him find the direction of the wind?
Answer:


Question: Water at 20 degrees Celsius is placed on a stove. As the water is heated, thermal energy is absorbed by the water. If the water is heated to a maximum temperature of 80 degrees Celsius, what happens as a result of the increased temperature?

Choices:
A. The potential energy increases.
B. The evaporation decreases.
C. The disorder decreases.
D. The entropy increases.

Answer: D

Question: Water at 20 degrees Celsius is placed on a stove. As the water is heated, thermal energy is absorbed by the water. If the water is heated to a maximum temperature of 80 degrees Celsius, what happens as a result of the increased temperature?
Answer:


Question: Why do two surfaces get warm when they are rubbed together?

Choices:
A. The surfaces absorb energy from the air.
B. Friction changes energy of motion to heat energy.
C. Moving objects produce heat energy.
D. Energy is transferred between the two surfaces.

Answer: B

Friction changes energy of motion to heat energy.

Question: Why do two surfaces get warm when they are rubbed together?
Answer:


Question: The Hardy-Weinberg law is only valid when

Choices:
A. the population is small.
B. migration into the population is occurring.
C. immigration into the population is occurring.
D. the population is large.

Answer: D

Question: The Hardy-Weinberg law is only valid when
Answer:


Question: An ice cube melts on a hot summer day because the energy of the particles

Choices:
A. decreases over a period of time and is lost.
B. increases and the particles move apart.
C. causes the particles to move closer together.
D. is converted into potential energy.

Answer: B

Question: An ice cube melts on a hot summer day because the energy of the particles
Answer:


Question: Which alternative energy resource changes part of a river into a lake?

Choices:
A. solar energy
B. geothermal energy
C. hydropower
D. biofuel energy

Answer: C

Question: Which alternative energy resource changes part of a river into a lake?
Answer:


Question: What happens to the molecules of a liquid when the liquid cools?

Choices:
A. They slow down.
B. They speed up.
C. They decrease in number
D. They decrease in size

Answer: A

Question: What happens to the molecules of a liquid when the liquid cools?
Answer:


Question: A structure that carries a single unit of hereditary information is a

Choices:
1. gene
2. tissue
3. sex cell
4. pedigree chart

Answer: 1

Question: A structure that carries a single unit of hereditary information is a
Answer:


Question: Which characteristic of a cold-water upwelling near the coast of Northern California results in a large concentration of marine organisms?

Choices:
A. loss of thermal stability
B. high nutrient concentration
C. consistent surface-current flow rate
D. increased availability of dissolved oxygen

Answer: B

Question: Which characteristic of a cold-water upwelling near the coast of Northern California results in a large concentration of marine organisms?
Answer:


Question: When two animals live in the same area and depend on the same organism for food, they are

Choices:
A. competing
B. decomposing
C. germinating
D. hibernating

Answer: A

Question: When two animals live in the same area and depend on the same organism for food, they are
Answer:


Question: When a prairie ecosystem was disturbed, an invasive grass species outcompeted the native grass. The new grass had less nutritional value for the organisms living in the area. Which category of organism will be affected by this change first?

Choices:
A. predators
B. herbivores
C. scavengers
D. decomposers

Answer: B

Question: When a prairie ecosystem was disturbed, an invasive grass species outcompeted the native grass. The new grass had less nutritional value for the organisms living in the area. Which category of organism will be affected by this change first?
Answer:


Question: Organisms that are classified as multicellular must have

Choices:
A. only one cell.
B. large cells.
C. more than one cell.
D. identical cells.

Answer: C

Question: Organisms that are classified as multicellular must have
Answer:


Question: Students are conducting an investigation to see how sunlight affects the speed of plant growth. They measure the growth of the plant at the end of two weeks. What would be the best way to communicate the results of this investigation?

Choices:
A. draw a picture
B. make some notes
C. make a chart or graph
D. tell the science teacher

Answer: C

Question: Students are conducting an investigation to see how sunlight affects the speed of plant growth. They measure the growth of the plant at the end of two weeks. What would be the best way to communicate the results of this investigation?
Answer:


Question: What objects are affected by Earth's gravity?

Choices:
A. only objects that have mass
B. only objects that sink in water
C. only objects that are made of metal
D. only objects that are heavier than air

Answer: A

Question: What objects are affected by Earth's gravity?
Answer:


Question: The trunk of a pine tree supports the tree. Which part of a daisy supports the plant the same way?

Choices:
A. stem
B. flower
C. root
D. leaf

Answer: A

Question: The trunk of a pine tree supports the tree. Which part of a daisy supports the plant the same way?
Answer:


Question: Which of the following characteristics will best prevent a tree from being blown over by high winds during a storm?

Choices:
A. deep roots
B. long branches
C. thick bark
D. wide leaves

Answer: A

Question: Which of the following characteristics will best prevent a tree from being blown over by high winds during a storm?
Answer:


Question: On a cold day, a student felt the tires of her bike before riding it to the store. When she arrived at the store, she felt the tires again and noticed that they were warmer. What caused the temperature of the bicycle tires to change?

Choices:
A. the wind blowing against the tires
B. the air escaping from the spinning tires
C. the rubbing between the ground and the tires
D. the heat transferring from the rider's hands to the tire

Answer: C

the rubbing between the ground and the tires

Question: On a cold day, a student felt the tires of her bike before riding it to the store. When she arrived at the store, she felt the tires again and noticed that they were warmer. What caused the temperature of the bicycle tires to change?
Answer:


Question: The pull of gravity from Earth has the greatest effect on

Choices:
A. comets.
B. the Sun.
C. asteroids.
D. the Moon.

Answer: D

Question: The pull of gravity from Earth has the greatest effect on
Answer:


Question: As humans grow, their bodies change. Which of these statements explains how humans grow?

Choices:
A. Cells form a cell wall.
B. Cells increase in size.
C. Cells undergo cell division.
D. Cells merge to become larger.

Answer: C

Question: As humans grow, their bodies change. Which of these statements explains how humans grow?
Answer:


Question: One way humans store energy is by making the molecule glycogen. Clusters of which atoms are rearranged when the body digests plant sugars to make glycogen?

Choices:
A. hydrogen, nitrogen, carbon
B. oxygen, sulfur, carbon
C. carbon, hydrogen, oxygen
D. nitrogen, carbon, sulfur

Answer: C

Question: One way humans store energy is by making the molecule glycogen. Clusters of which atoms are rearranged when the body digests plant sugars to make glycogen?
Answer:


Question: What kind of energy do all moving objects have?

Choices:
A. Light energy
B. Solar energy
C. Kinetic energy
D. Renewable energy

Answer: C

Question: What kind of energy do all moving objects have?
Answer:


Question: In which ways are hills most different from mountains?

Choices:
A. Hills are smaller and more rounded.
B. Hills are deeper and more level.
C. Hills are steeper and rockier.
D. Hills are taller and snowy.

Answer: A

Question: In which ways are hills most different from mountains?
Answer:


Question: Which is a statement of fact?

Choices:
A. The Sun is very pretty.
B. The Sun is fun to study.
C. The Sun is larger than Earth.
D. The Sun is more interesting than the Moon.

Answer: C

Question: Which is a statement of fact?
Answer:


Question: Which would be the most likely effect of a large decrease in the number of woodpeckers in a forest?

Choices:
A. Temperatures would increase.
B. Precipitation would increase.
C. The number of trees in the forest would increase.
D. The insect population in the forest would increase.

Answer: D

The insect population in the forest would increase.

Question: Which would be the most likely effect of a large decrease in the number of woodpeckers in a forest?
Answer:


Question: All of these elements are metals except

Choices:
A. gold.
B. helium.
C. sodium.
D. aluminum.

Answer: B

Question: All of these elements are metals except
Answer:


Question: What are the parts that make up an atom?

Choices:
A. electrons, neutrons, and protons
B. electrons, protons, and gamma rays
C. neutrons, photons, and beta particles
D. neutrons, protons, and alpha particles

Answer: A

Question: What are the parts that make up an atom?
Answer:


Question: Which scientist is credited for the development of the polio vaccine?

Choices:
A. Jonas Salk
B. Neil Armstrong
C. Albert Einstein
D. Jacques Cousteau

Answer: A

Question: Which scientist is credited for the development of the polio vaccine?
Answer:


Question: Which of the following must all plant and animal species do in order for each species to survive?

Choices:
A. migrate
B. reproduce
C. make food
D. change color

Answer: B

Question: Which of the following must all plant and animal species do in order for each species to survive?
Answer:


Question: A cut to the skin is treated with antiseptic first to avoid

Choices:
A. an immune response.
B. a bacterial infection.
C. bruising of tissues.
D. an allergic reaction.

Answer: B

Question: A cut to the skin is treated with antiseptic first to avoid
Answer:


Question: Which best describes the structure of an atom?

Choices:
A. a lightweight core surrounded by neutral particles
B. a massive core surrounded by negatively-charged particles
C. a network of interacting positive and negative particles
D. overlapping layers of neutral, positive, and negative particles

Answer: B

a massive core surrounded by negatively-charged particles

Question: Which best describes the structure of an atom?
Answer:


Question: A student throws a ball into the air. While the ball travels up, the speed of the ball decreases. What force causes the ball to slow while traveling up?

Choices:
A. electricity
B. gravity
C. magnetism
D. tension

Answer: B

Question: A student throws a ball into the air. While the ball travels up, the speed of the ball decreases. What force causes the ball to slow while traveling up?
Answer:


Question: A research scientist writes a paper on the initial regrowth of a forest after a fire has damaged the entire ecosystem. Which title would be best for the paper?

Choices:
A. Primary Succession
B. Stable Communities
C. Climax Communities
D. Secondary Succession

Answer: D

Question: A research scientist writes a paper on the initial regrowth of a forest after a fire has damaged the entire ecosystem. Which title would be best for the paper?
Answer:


Question: What allows a light bulb to give off light?

Choices:
A. the current flowing through the wire to the light bulb
B. the light bulb giving electrical energy to the battery
C. the light bulb generating heat energy
D. the battery pushing light through the wire

Answer: A

the current flowing through the wire to the light bulb

Question: What allows a light bulb to give off light?
Answer:


Question: Plants and animals are composed of organic compounds. Which of the following are the common elements found in organic compounds?

Choices:
A. iron, oxygen, nickel, copper.
B. sodium, potassium, gold, hydrogen.
C. helium, neon, argon, krypton.
D. carbon, hydrogen, oxygen, nitrogen.

Answer: D

Question: Plants and animals are composed of organic compounds. Which of the following are the common elements found in organic compounds?
Answer:


Question: A student sees many plants around a pond. The student can determine which plants are nonvascular by

Choices:
A. observing if they lack true stems, roots, or leaves
B. examining the plants for spores
C. counting the number of leaves on each stalk
D. noticing if the plants are near rocks

Answer: A

observing if they lack true stems, roots, or leaves

Question: A student sees many plants around a pond. The student can determine which plants are nonvascular by
Answer:


Question: During which process are pieces of rock material being moved over Earth's surface by water and wind?

Choices:
A. conduction
B. deposition
C. erosion
D. revolution

Answer: C

Question: During which process are pieces of rock material being moved over Earth's surface by water and wind?
Answer:


Question: During which activity should a student wear goggles?

Choices:
A. writing a science report
B. mixing baking soda with water
C. measuring the length of a shadow
D. examining a leaf with a microscope

Answer: B

Question: During which activity should a student wear goggles?
Answer:


Question: Solar radiation provides more heat near the equator than near the poles on Earth. The greatest amount of heat is moved away from the equator by

Choices:
A. ocean currents.
B. aquatic plants.
C. surface winds.
D. tectonic plates.

Answer: A

Question: Solar radiation provides more heat near the equator than near the poles on Earth. The greatest amount of heat is moved away from the equator by
Answer:


Question: Some antibiotics used to treat infections in humans are also used to treat chickens, but some groups oppose this practice. The overuse of the antibiotics will most likely influence the natural selection of which type of organisms?

Choices:
A. chickens that naturally make the antibiotics
B. microbes that are resistant to the antibiotics
C. microbes that are susceptible to the antibiotics
D. chickens that are resistant to infection

Answer: B

microbes that are resistant to the antibiotics

Question: Some antibiotics used to treat infections in humans are also used to treat chickens, but some groups oppose this practice. The overuse of the antibiotics will most likely influence the natural selection of which type of organisms?
Answer:


Question: Which condition is necessary for metamorphic rocks to form?

Choices:
A. constant weathering and erosion
B. extreme pressure and heating
C. rapid burial of sediments
D. slow cooling of magma

Answer: B

Question: Which condition is necessary for metamorphic rocks to form?
Answer:


Question: The length of one day on Earth is determined by how long it takes

Choices:
1. the Moon to revolve once
2. the Moon to rotate once
3. Earth to rotate once
4. Earth to revolve once

Answer: 3

Question: The length of one day on Earth is determined by how long it takes
Answer:


Question: Which of the following is more likely to occur in a plant cell than in an animal cell?

Choices:
A. synthesis of enzymes
B. formation of cellulose
C. breakdown of glucose
D. active transport of ions

Answer: B

Question: Which of the following is more likely to occur in a plant cell than in an animal cell?
Answer:


Question: Over time, dried lava from an old volcano is worn down and broken into small pieces. When these pieces pile up and are cemented together to form new rock, how would this new rock be classified?

Choices:
A. magma
B. igneous
C. sedimentary
D. metamorphic

Answer: C

Question: Over time, dried lava from an old volcano is worn down and broken into small pieces. When these pieces pile up and are cemented together to form new rock, how would this new rock be classified?
Answer:


Question: Which organ system communicates with cells in muscle tissue so that the muscles contract or relax, allowing the body to move?

Choices:
A. circulatory system
B. nervous system
C. respiratory system
D. excretory system

Answer: B

Question: Which organ system communicates with cells in muscle tissue so that the muscles contract or relax, allowing the body to move?
Answer:


Question: When chemicals in the atmosphere dissolve in water droplets, they precipitate with the water and pollute water reservoirs on Earth. The pollutants enter the food chain when aquatic organisms absorb them. Which of these pollutants eventually contaminates fish after coal is burned?

Choices:
A. lead
B. arsenic
C. mercury
D. aluminum

Answer: C

Question: When chemicals in the atmosphere dissolve in water droplets, they precipitate with the water and pollute water reservoirs on Earth. The pollutants enter the food chain when aquatic organisms absorb them. Which of these pollutants eventually contaminates fish after coal is burned?
Answer:


Question: What is the smallest unit of a chemical compound that still has the properties of that compound?

Choices:
A. a nucleus
B. a molecule
C. an element
D. an atom

Answer: B

Question: What is the smallest unit of a chemical compound that still has the properties of that compound?
Answer:


Question: Roberto is sliding down a plastic slide on the playground. After he reaches the ground, he feels a small electric shock when he touches a piece of metal. What has been built up on his body that causes the shock?

Choices:
A. atoms
B. electrons
C. neutrons
D. protons

Answer: B

Question: Roberto is sliding down a plastic slide on the playground. After he reaches the ground, he feels a small electric shock when he touches a piece of metal. What has been built up on his body that causes the shock?
Answer:


Question: Each year the Earth moves once around

Choices:
A. Mars
B. the Sun
C. the Moon
D. all the other planets

Answer: B

Question: Each year the Earth moves once around
Answer:


Question: Miranda learned how the human body carries out life functions. Which is the most basic level of organization in the human body?

Choices:
A. an organ
B. a system
C. a tissue
D. a cell

Answer: D

Question: Miranda learned how the human body carries out life functions. Which is the most basic level of organization in the human body?
Answer:


Question: Russell wants to observe changes in nature over the next few months. What can a thermometer help Russell investigate?

Choices:
A. rainfall amounts each week
B. tiny organisms in pond water
C. the high temperatures each day
D. the amount of growth in a plant

Answer: C

Question: Russell wants to observe changes in nature over the next few months. What can a thermometer help Russell investigate?
Answer:


Question: Which of the following is a chemical property of silver?

Choices:
A. malleable
B. white metal
C. conductor of heat
D. reacts with nitric acid

Answer: D

Question: Which of the following is a chemical property of silver?
Answer:


Question: As members of a food web, humans are considered to be

Choices:
A. producers.
B. consumers.
C. decomposers.
D. scavengers.

Answer: B

Question: As members of a food web, humans are considered to be
Answer:


Question: The nervous system consists of the brain, spinal cord, and nerves that run throughout the entire body. Which of these is one function of the nervous system?

Choices:
A. supports body posture
B. controls body functions
C. supplies the blood with oxygen
D. carries blood to and from the heart

Answer: B

Question: The nervous system consists of the brain, spinal cord, and nerves that run throughout the entire body. Which of these is one function of the nervous system?
Answer:


Question: A geologist found several types of seashell fossils in a rock layer. Which is the best conclusion about the rock layer?

Choices:
A. The rock was once buried under a swamp.
B. Water from a river washed across the rock.
C. The rock was once sediment at the bottom of an ocean.
D. Migrating animals dropped the seashell into the rock.

Answer: C

The rock was once sediment at the bottom of an ocean.

Question: A geologist found several types of seashell fossils in a rock layer. Which is the best conclusion about the rock layer?
Answer:


Question: At one station in a production line, a worker must drill a hole in each end of wooden boards. At the next station, another worker attaches two of the boards together using metal fasteners that fit in the holes. Which of the following processes will ensure that the wooden boards fit together with the fewest errors?

Choices:
A. placing the parts on a conveyor belt to keep them moving quickly
B. using a fixture to hold the boards in place as the holes are drilled
C. inspecting the boards after they are attached to each other
D. installing equipment to protect workers from debris

Answer: B

using a fixture to hold the boards in place as the holes are drilled

Question: At one station in a production line, a worker must drill a hole in each end of wooden boards. At the next station, another worker attaches two of the boards together using metal fasteners that fit in the holes. Which of the following processes will ensure that the wooden boards fit together with the fewest errors?
Answer:


Question: What is the effect of absorption of infrared light by human skin?

Choices:
A. sunburn on the skin surface
B. disinfection of the skin tissues
C. feeling of warmth on the skin
D. immediate death of skin cells

Answer: C

Question: What is the effect of absorption of infrared light by human skin?
Answer:


Question: The first powerful telescopes were built during the early 1600s. Scientists at that time were able to learn more about which subject by using the telescope?

Choices:
A. the shape of continents of Earth
B. the effect of storms and hurricanes
C. forces changing the surface of Earth
D. planets and moons in the solar system

Answer: D

Question: The first powerful telescopes were built during the early 1600s. Scientists at that time were able to learn more about which subject by using the telescope?
Answer:


Question: Clear cutting of old growth forests in Oregon provides lumber for housing. In the process of clear cutting, plant diversity decreases and some organisms are pushed to extinction. Clear cutting is an example of

Choices:
A. a change in aquatic conditions.
B. a change in societal conditions.
C. a change in atmospheric conditions.
D. a change in environmental conditions.

Answer: D

Question: Clear cutting of old growth forests in Oregon provides lumber for housing. In the process of clear cutting, plant diversity decreases and some organisms are pushed to extinction. Clear cutting is an example of
Answer:


Question: Which characteristic of wolves is most likely learned?

Choices:
A. fur color
B. eyesight
C. litter size
D. social behavior

Answer: D

Question: Which characteristic of wolves is most likely learned?
Answer:


Question: Four students tried to find out which magnet was the strongest. They each shared one idea. Which idea shows scientific thinking?

Choices:
A. We can pick the longest magnet.
B. We can pick the heaviest magnet.
C. We can measure the strength of the magnets.
D. We can vote for the magnet that we think is the strongest.

Answer: C

We can measure the strength of the magnets.

Question: Four students tried to find out which magnet was the strongest. They each shared one idea. Which idea shows scientific thinking?
Answer:


Question: In which way is a prokaryotic cell different from a eukaryotic cell?

Choices:
A. A prokaryotic cell is larger.
B. A prokaryotic cell has no nucleus.
C. A prokaryotic cell can reproduce itself.
D. A prokaryotic cell has a cell membrane.

Answer: B

Question: In which way is a prokaryotic cell different from a eukaryotic cell?
Answer:


Question: A student wants to find out how many different kinds of birds are found in a park. In addition to a bird identification book, the student should use ___.

Choices:
A. binoculars
B. goggles
C. a microscope
D. a hand lens

Answer: A

Question: A student wants to find out how many different kinds of birds are found in a park. In addition to a bird identification book, the student should use ___.
Answer:


Question: Most of the United States is a part of which tectonic plate?

Choices:
A. Pacific Plate
B. Eurasian Plate
C. North American Plate
D. South American Plate

Answer: C

Question: Most of the United States is a part of which tectonic plate?
Answer:


Question: Students are preparing to determine the boiling points of several aqueous solutions. In addition to proper lab attire, what devices or instruments will the students need to conduct this experiment?

Choices:
A. hot plate, beaker, masking tape
B. thermometer, hot plate, beaker
C. matches, beaker, thermometer
D. balance, hot plate, thermometer

Answer: B

Question: Students are preparing to determine the boiling points of several aqueous solutions. In addition to proper lab attire, what devices or instruments will the students need to conduct this experiment?
Answer:


Question: Which statement best describes the development of a human embryo?

Choices:
A. A single cell becomes many cells.
B. Each cell has a different function.
C. Many cells combine to form one cell.
D. All the cells have the same function.

Answer: A

Question: Which statement best describes the development of a human embryo?
Answer:


Question: Which human body systems work directly together to allow locomotion?

Choices:
1. circulatory, excretory, and respiratory
2. circulatory, endocrine, and reproductive
3. skeletal, muscular, and nervous
4. skeletal, digestive, and respiratory

Answer: 3

Question: Which human body systems work directly together to allow locomotion?
Answer:


Question: Which of these is the best example of sexual reproduction?

Choices:
A. binary fission
B. budding
C. fusing gametes
D. fragmentation

Answer: C

Question: Which of these is the best example of sexual reproduction?
Answer:


Question: What helps skin feel heat and pressure?

Choices:
A. muscle cells
B. blood cells
C. nerve cells
D. bone cells

Answer: C

Question: What helps skin feel heat and pressure?
Answer:


Question: What can be inferred from a food product advertisement that claims "30% less fat than our leading competitors"?

Choices:
A. It is a sugar-free product.
B. It will help a person lose weight.
C. It is the healthiest choice available.
D. The fat content of the item is reduced.

Answer: D

Question: What can be inferred from a food product advertisement that claims "30% less fat than our leading competitors"?
Answer:


Question: The visible light spectrum can be subdivided according to

Choices:
A. the types of waves.
B. the sizes of particles.
C. a range of colors.
D. a type of energy.

Answer: C

Question: The visible light spectrum can be subdivided according to
Answer:


Question: After a storm, a hospital may have to rely on backup generators to power some equipment. Which is the energy conversion provided by the generators?

Choices:
A. mechanical energy to electrical energy
B. thermal energy to mechanical energy
C. nuclear energy to mechanical energy
D. thermal energy to electrical energy

Answer: A

Question: After a storm, a hospital may have to rely on backup generators to power some equipment. Which is the energy conversion provided by the generators?
Answer:


Question: Which type of storm causes the most flooding in areas located near an ocean coastline?

Choices:
A. Tornado
B. Hurricane
C. Blizzard
D. Freezing rain

Answer: B

Question: Which type of storm causes the most flooding in areas located near an ocean coastline?
Answer:


Question: Lamar learned that birds, mammals, and reptiles are all vertebrates. Which characteristic do all vertebrates share?

Choices:
A. They all lay eggs.
B. They all have feathers.
C. They all have a backbone.
D. They are all warm-blooded.

Answer: C

Question: Lamar learned that birds, mammals, and reptiles are all vertebrates. Which characteristic do all vertebrates share?
Answer:


Question: Eating food that is undercooked can lead to a disease that affects the digestive system. Which body part is directly affected by the disease?

Choices:
A. intestines
B. arteries
C. nerves
D. sinuses

Answer: A

Question: Eating food that is undercooked can lead to a disease that affects the digestive system. Which body part is directly affected by the disease?
Answer: