Cycling of Matter in Ecosystems

This is an image of a what?

• Food web

• Food Chain

• Life Cycle

• Life Chain

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NGSS.MS-LS2-2

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According to the image

• The rabbit is getting energy from the fox

• The grass is getting energy from the rabbit

• The fox is getting energy from the rabbit

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A decomposer in an ecosystem gets its energy by:

• consuming, or eating, other organisms

• breaking down dead organisms

• drinking water

• using the sun to make its own energy

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NGSS.MS-LS2-3

The arrows in a food web show the direction...

• water is flowing

• matter or energy are flowing

• organisms are moving in

• consumers are moving in

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NGSS.MS-LS1-6

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How does matter move among the living and nonliving parts of an ecosystem?

• matter is recycled within and between ecosystems

• one-way flow of energy

• two-way flow of energy only

• three-way flow of energy only

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What role do decomposers play in the phosphorous cycle?

• absorb phosphorous 

• release phosphorous into atmosphere

• return phosphorous into the soil

• combustion

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NGSS.MS-LS2-3

If photosynthesis and cellular respiration keep CO2 and O2 stable in the atmosphere, what could cause a man made imbalance?

• Use of fossil fuels

• Increase in photosynthesis

• Increase in cellular respiration

• Decrease in photosynthesis

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NGSS.MS-ESS3-4

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The diagram shows the flow of organic molecules through an ecosystem. One process that occurs in this ecosystem is labeled X, and another that occurs is labeled Y.

Which two processes are identified as X and Y?

• X: respiration

  Y: predation

• X: adaptation

  Y: decomposition

• X: fermentation

  Y: nitrogen fixation

• X: decomposition

  Y: respiration

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

This is an image of a what?

• Food web

• Food chain

• Life cycle

• Life chain

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

decomposers

• break down organism into small pieces that go back to the soil as nutrients and minerals.

• produce their own food

• consume other organisms like plants and animals for food

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NGSS.MS-LS2-3

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