Unit 2 Test Practice

True or False: Matter in an ecosystem is not created or destroyed. It remains constant.

• True

• False

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​ (a)   species reproduce rapidly in a new habitat due to lack of predators that would naturally control their population growth.

• Invasive
• Keystone

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Examples of invasive species that we talked about in class include (select 3)

• Kudzu
• Lionfish
• Burmese Python
• Giraffes

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NGSS.MS-LS2-4

All of the energy in an ecosystem comes from the

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NGSS.MS-LS1-6

In a typical ecosystem, what percentage of energy is passed on to the next Trophic level?

• 10%

• 1%

• 100%

• .1%

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NGSS.MS-LS2-3

Consider this food chain:

Algae --> Minnows --> Bass --> Hawk

What would most likely happen if the bass disappeared because of over fishing by humans?

• The algae population would grow

• The minnow population woiuld quickly increase resulting in less algae

• The Hawk population would increase due to more resources

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-1

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What happens to matter that is not used by consumers in a food chain?

• It is returned back to the ecosystem and used by other organisms

• It disappears forever

• it is stored by organisms for use later

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NGSS.MS-LS2-3

The (a)   consumer in a food web has the least amount of energy available to it.

• Tertiary
• Primary
• Producer

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NGSS.MS-LS2-3

A farmer sprays insecticide on his crops. How would this effect the farms ecosystem?

• It would have no effect.

• the spray would wipe out insects, but other consumers would not be effected.

• The sector of insects and insect eating animals would be greatly effected.

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NGSS.MS-LS2-4

NGSS.MS-LS2-1

The Wolves that were returned to Yellowstone National Park had a huge impact on the environment, even effecting the shapes of rivers and streams and the height of trees even though they do not eat the trees. Animals like these whose presence directly effects the health of the entire ecosystem are known as what?

• Invasive Species

• Keystone Species

• Endangered Species

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NGSS.MS-LS2-4