NGSS.MS-LS2-4

Prairie dogs rely on underground tunnels for shelter. Which bestexplains how the prairie dog population is affected when their tunnels are disrupted and exposed?

• The prairie dogs are burned by the sun.
• The prairie dogs are exposed to predators
• The prairie dogs can find more food to eat in the fields
• The prairie dogs are forced to learn to live in trees and shrubs

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NGSS.MS-LS2-4

Which of the following is an abioitic factor that could affect biotic factors?

• Population of rabbits.

• Length of daylight.

• Presence of harmful bacteria.

• Number of herbivores.

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NGSS.MS-LS2-4

Why is biodiversity important to ecosystems?

• It helps populations adapt to ecological changes.

• It increases at each level of the food chain.

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NGSS.MS-LS2-4

Which BEST explains what would happen if decomposers disappeared in an ecosystem?

• everything would stop functioning immediately.

• everything would function normally.

• the ecosystem would become cleaner

• the ecosystem would be overrun with dead matter.

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NGSS.MS-LS2-4

Polar bears live in the Arctic. Ice in the Arctic in melting rapidly, reducing the range in which the polar bear can live. If polar bears do not have adaptation that allow them to survive these changes, what might happen to them?

• become another speices

• overpopulation

• change the enviornment

• become extinct

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NGSS.MS-LS2-4

A landslide carries many tons of rock from a hillside into a valley. All of the plants in the valley are buried. New plants that begin to grow in the valley after the landslide will MOST LIKELY lack

• clean air

• rich soil

• bright light

• fresh water

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NGSS.MS-LS2-4

Which of the following events is most likely to cause an environmental disturbance in a grassland biome?

• earthquake

• volcanic eruption

• hurricane

• fire caused by lightning

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NGSS.MS-LS2-4

Changes to abiotic factors in an environment can impact biotic factors. Which statement is the BEST example of this situation?

• Heavy rainfall increases soil erosion.

• Melting glaciers cause sea levels to rise.

• Cold temperatures cause rocks to weather.

• Drought conditions increase competition among consumers.

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NGSS.MS-LS2-4

Which of the following could NOT prevent a population from growing?

• Food

• Disease

• Space

• Migration

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NGSS.MS-LS2-4

Which best describes a method of obtaining energy that may cause changes in water temperature and harm to fish populations?

• burning coal

• using ethanol in cars

• installing solar panels on a home

• generating electricity in a hydroelectric power plant

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NGSS.MS-LS2-4