Ecosystems 3

A bee depends on certain flowers for food. The flowers depend on the bee to

• carry pollen for reproduction.

• make sugars for photosynthesis.

• remove wastes for healthy growth.

• sting herbivores for protection.

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NGSS.MS-LS1-4

Which best describes the importance of photosynthesis in an ecosystem?

• It allows plants to create energy and pass it along to other members of the ecosystem.

• It allows animals to create energy and pass it along to other members of the ecosystem.

• It allows decomposers to create energy and pass it along to other members of the ecosystem.

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NGSS.MS-LS1-6

Which best describes the role of both mushrooms and worms in an ecosystem?

• They provide food for carnivores.

• They provide food for herbivores.

• They provide nutrients for the soil.

• They provide nutrients during photosynthesis.

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NGSS.MS-LS2-3

Which would be most directly affected by a reduction in nutrients in the soil?

• sunlight

• abiotic factors

• plant community

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Which best explains how abiotic factors affect organisms in an ecosystem?

• Abiotic factors rely on living organisms to survive in an ecosystem.

• Abiotic factors affect the food chain of organisms within the ecosystem.

• Abiotic factors determine the amount of pollution present in an ecosystem.

• Abiotic factors affect the type and number of organisms living in an ecosystem.

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NGSS.MS-LS2-4

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As more people have moved to the beach, the sea turtle population has decreased. Which is most likely the cause of this decrease?

• tropical storms

• increase in predators

• habitat loss

• warmer temperatures

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NGSS.MS-LS2-4

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It is common to see wild animals like deer and coyotes in large cities and neighborhoods. Which is most likely a reason the animals are found in these areas?

• They prefer to be near houses.

• They prefer to be near people.

• Their habitat is increasing in size.

• Their habitat is decreasing in size.

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NGSS.MS-LS2-4

Noah visited a park that had many oak trees. Which BEST describes the role of an oak tree in its ecosystem?

• Oak trees can live for a long time.

• Oak trees have leaves that change colors.

• Oak trees have strong branches and trunks.

• Oak trees are a source of food and shelter for animals.

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NGSS.MS-LS2-4

A simple food chain includes hawks, lizards, and insects. Which will most likely happen to the lizard and hawk populations if a pesticide is sprayed to kill the insects, and the lizard and hawk populations cannot find other food in this ecosystem?

• Both the lizard population and the hawk population will increase.

• Both the lizard population and the hawk population will decrease.

• The lizard population will increase, but the hawk population will decrease.

• The lizard population will decrease, but the hawk population will increase.

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NGSS.MS-LS2-4

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What is an example of a shelter in an ecosystem?

• a gray squirrel eating an acorn

• a raccoon in a hollow log

• a blue whale migrating

• a tick feeding on a coyote