NGSS.MS-LS2-3

A student sets up a compost bin outdoors. Inside the bin microorganisms convert the student’s vegetable and paper scraps into rich fertilizer. Which of the following best describes the role that these microorganisms play in natural habitats?

• The microorganisms help balance the numbers of producers and consumers.
• The microorganisms help keep nutrients cycling through the ecosystem.
•  The microorganisms turn solar energy into sugars.
• The microorganisms function as autotrophs.

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NGSS.MS-LS2-3

Carbon is stored in

• Trees and other living things
• Oceans
• underground in soil and fossil fuels
• All are correct

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NGSS.MS-LS2-3

Energy in an ecosystem is used for growth or lost as __________

• light
• heat
• death
• biomass

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NGSS.MS-LS2-3

Nonliving things found in an ecosystem.

• factories
• factor trees
• biotic factors
• abiotic factors

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NGSS.MS-LS2-3

Which contributes most in supporting life on the deep ocean floor?

• cold water temperatures
• extreme water pressure
• hydrothermal vents
• lack of predators

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NGSS.MS-LS2-3

Water, nitrogen, carbon dioxide, and oxygen are examples of substances __________between the biotic and abiotic parts of an environment.

• respiration

• recycled

• community

• perspired

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NGSS.MS-LS2-3

How much energy moves from trophic level to trophic level?

• 100%

• 50%

• 1%

• 10%

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NGSS.MS-LS2-3

What converts nitrogen into a useable form for plants and animals?

• bacteria
• fungi
• rain

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NGSS.MS-LS2-3

Temperature, light, air, water, and soil are all  _____  parts of the environment

• alive
• biotic 
• abiotic
• living

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NGSS.MS-LS2-3

Which of the following trophic levels would have the least amount of energy?

• tertiary consumer

• producer

• secondary consumer

• primary consumer

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NGSS.MS-LS2-3