NWEA Science Practice Test

How do human activities impact the balance of an ecosystem?

• Human activities only have a positive impact on the balance of an ecosystem

• Human activities can only impact the balance of an ecosystem in one specific way

• Human activities have no impact on the balance of an ecosystem

• Human activities can impact the balance of an ecosystem in various ways such as habitat destruction, pollution, introduction of invasive species, and overexploitation of natural resources.

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NGSS.MS-ESS3-4

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Energy transfer: Explain the process of photosynthesis and its role in energy transfer.

• Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll. It plays a crucial role in energy transfer as it converts light energy into chemical energy stored in glucose.

• Photosynthesis only occurs in animals

• Photosynthesis has no role in energy transfer

• Photosynthesis is the process of converting glucose into light energy

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NGSS.MS-LS1-6

Energy transfer Question 3: What is the role of producers, consumers, and decomposers in energy transfer within an ecosystem?

• Producers convert soil into energy through photosynthesis, consumers obtain energy by consuming decomposers, and decomposers break down living organisms to release energy back into the ecosystem.

• Producers convert water into energy through photosynthesis, consumers obtain energy by consuming rocks, and decomposers break down living organisms to release energy back into the ecosystem.

• Producers convert air into energy through photosynthesis, consumers obtain energy by consuming sunlight, and decomposers break down non-living materials to release energy back into the ecosystem.

• Producers convert sunlight into energy through photosynthesis, consumers obtain energy by consuming producers or other consumers, and decomposers break down dead organisms and waste to release energy back into the ecosystem.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the role of decomposers in an ecosystem?

• To provide energy to the producers in the ecosystem

• To hunt and consume other organisms for energy

• To break down dead organisms and organic matter, returning nutrients to the soil for other organisms to use.

• To regulate the population of other organisms in the ecosystem

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NGSS.MS-LS2-3

Which of the following is NOT a renewable resource?

• Solar energy

• Wind energy

• Coal

• Hydroelectric power

Which of the following is a chemical change?

• Dissolving salt in water

• Boiling water

• Burning wood

• Melting ice

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the term for the amount of matter in an object?

• Weight

• Density

• Mass

• Volume

In the water cycle, which process involves water vapor cooling and changing into liquid water?

• Evaporation

• Condensation

• Precipitation

• Transpiration

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NGSS.MS-ESS2-4

Which of the following is an example of a physical change?

• Rusting of iron

• Burning of gasoline

• Dissolving sugar in water

• Cooking an egg

Which of the following is a property that can be used to identify a substance?

• Color

• Smell

• Density

• All of the above