Unit 3 Ecosystems

1. What will most likely happen when the water that is available for a population of deer becomes polluted?

• The deer population won't be changed.

• The deer population will get smaller due to no drinkable water.

• The deer population will get larger because there is no drinkable water.

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2. How would a rabbit population be affected if the land they lived on was cleared to build houses?

• The rabbit population would increase.

• The rabbit population would remain the same.

• The rabbit population would decrease.

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3. What does every living thing in an ecosystem need for survival?

• Animals

• Plants

• Water

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4. If an ecosystem depends on pine trees and all of those trees are cut down to build houses, what will probably happen?

• Some of the living things would be able to survive because there would be erosion.

• The living things would have to adapt to living around houses and fences

• Many of the living things would have to move to find new homes or die.

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5. What would probably happen to a population of owls if their food source of mice were taken away?

• The owls would immediately starve to death.

• The owls would eat another similar animal for their food.

• The owls would change to eating berries found in the same area.

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6. What is the place where a member of a population lives and finds food?

• space

• habitat

• niche

7. What best describes the reaction of a new population to getting more space in the area it lives in?

• The population will die.

• The population will stay the same.

• The population will get larger.

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8. Prairie dogs live underground as their shelter. What will happen to them if the tunnels they live in get dug up and destroyed?

• The prairie dogs will be exposed to predators that will eat them.

• The prairie dogs will learn to live in trees and bushes instead of underground.

• The prairie dogs will be burned by the sun and die.

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A lion is a predator that eats antelopes in Africa. What is being described in this sentence?

• An abiotic factor.

• It is the lion's habitat.

• It is the lion's niche.

10. There are 10 fish in a 5 gallon aquarium. The pet store owner adds 10 more fish to the tank. What will probably happen to the fish in the tank?

• They will be just fine even though they have less space to swim in.

• They will suffer and might get sick and die because they need more space to live in.

• They will suffer because the water will get warmer.

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