Unit 4 Energy and Matter in Ecosystems

Which of the following is a nonliving part of an ecosystem?

• Fish

• Snail

• Water

• Lily pad

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NGSS.MS-LS2-3

Sara made a model of a food chain. The living things in her food chain were a cricket, frog, and snake. Which is missing from the model?

• Prey

• Consumer

• Producer

• Food Source

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NGSS.MS-LS2-3

Which organism would be found at the bottom of a food pyramid?

• Bee

• Robin

• Snake

• Flower

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NGSS.MS-LS2-3

Which kind of diagram shows how much energy passes along as one organism consumes another?

• Decomposition

• Energy Pyramid

• Food Chain

• Food Web

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NGSS.MS-LS2-3

What does a food web show?

• What food organisms eat.

• Why organisms find food.

• How predators catch prey.

• When organisms seek food.

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NGSS.MS-LS2-3

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Which is an example of a decomposer?

• Grass

• Bird

• Snake

• Mushroom

Newly introduced plants compete with native plants for resources. Which statement describes what is likely to happen to native plants that compete with fasting-growing newly introduced plants?

• Their numbers will decrease.

• Their numbers will increase slightly.

• Their numbers will stay the same.

• Their numbers will increase greatly.

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Which description is of a producer?

• An animal that eats only plants.

• The process plants use to make food.

• A living thing that makes its own food.

• A living thing that eats other living things.

In this food web, from where does the frog get matter?

• From the fish

• From the snail

• From the grass

• From the grasshopper

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NGSS.MS-LS2-3

What role do nonliving things play in an ecosystem?

• They are food for the plants and animals.

• They prevent competition among populations.

• They determine which plants and animals can live there.

• They help control the effects humans might have on the ecosystem.

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