Environmental Change

Raccoons eat aquatic animals. If chemicals entered the lake with rain water and destroyed the plants, how would this impact the raccoon population?

• Raccoons would have more aquatic animals to eat.

• Raccoons would begin eating land plants.

• Raccoons would have less aquatic animals to eat.

• Raccoons would only drink water.

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The nesting habits of four types of birds are above. If all the dead branches and dying trees in a wooded area are removed, which bird's nesting habit would be most affected?

• Baltimore Oriole

• Barn Swallow

• Downy Woodpecker

• Belted kingfisher

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Which of the following would most likely result in a decrease in the population of insect-eating birds that build their nest on trees?

• Overhunting of animals that prey on birds

• Observation of birds by scientist

• Introduction of a new type of insect

• Clearing of forests to build a highway

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What is the original source of Energy in a food web?

• Decomposers (Bacteria and Fungi)

• Producers (Plants)

• Consumers (Animals)

• Sun

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Mold, fungi, and some types of bacteria are classified as decomposers. What is the role of a decomposer in a food web?

• break down waste and dead organisms

• use sunlight and water to produce their own food

• release oxygen into the atmosphere for respiration

• to provide the energy animals need for food

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Changes to an environment may make it more difficult for an organism to find-

• food.

• shelter.

• water.

• all of the above

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When changes to an environment happen, animals-

• move.

• perish.

• adapt.

• all of the above

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If all of the water dries up in a pond, the fish will-

• move into a new pond.

• swim faster.

• thrive.

• perish.

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An ______ includes all living and nonliving things together in an area.

• population

• ecosystem

• consumers

• producers

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When a population thrives, it means that-

• the number of organisms is decreasing.

• it is growing strong and reproducing.

• the number of organisms is increasing.

• the number of organisms stays the same.