Food Chains, Food Webs, Energy Pyramid and Cycles

What happens to matter in an ecosystem?

• It cycles between parts of an ecosystem

• It is created by producers

• It is destroyed as time goes on

• It is lost to other ecosystems

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The main source of energy in an ecosystem is.....

• Heat

• Matter

• Sunlight

• Consumers

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In an ecosystem, energy...

• is decomposed by fungi

• is eaten by animals

• moves as a circle

• Is mostly lost as heat

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A field mouse that eats grass is called a

• first level producer

• first level consumer or primary consumer

• second level consumer or secondary consumer

• second level decomposer

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Why is a food web a better model of how energy moves in an ecosystem than a food chain?

• food chains include decomposers, which do not play a role in energy movement

• Food webs show that animals can get energy from more than one source

• Food chains show how matter moves through an ecosystem not energy

• Food webs include how energy enters the ecosystems, and food chains do not.

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Which of the following shows the order of organisms from level 1 to level 4 of the energy pyramid?

• decomposer - producer - primary consumer - secondary consumer

• producer - primary consumer - secondary consumer - tertiary consumer

• producer - primary consumer - secondary consumer - decomposer

• tertiary consumer - secondary consumer - primary consumer - producer

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Which statement explains why organisms in higher trophic levels have less available energy than those in lower trophic levels?

• Organisms at the top of the pyramid are more likely to make their own food

• Organisms use some of the energy they take in and have less to pass on

• Organisms at the top of the pyramid have less water available to them

• Organisms at the top of the pyramid need less nutrients to survive.

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How does energy move in an ecosystem?

• It flows in one direction

• It cycles endlessly

• It cycles one time only

• It isn't passed from one organism to another. Each organism must make their own energy.

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How does matter move in an ecosystem?

• It flows in one direction, being passed from one organism to another.

• It cycles endlessly from the non-living and living things

• it cycles one time only

• It does not move, it stays in one place

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NGSS.MS-LS1-6

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What organism gets energy from the rabbit?

• hawk

• snake

• butterfly

• cricket

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