Ecosystems, Food Chains, and Changes to Food Chains

Farmers plant fruit trees in an area that was once a grassy meadow. Which will most likely happen to the rabbits living in the meadow?

• They will learn to eat fruit.

• They will learn to climb trees.

• The number of their young will increase.

• The size of their population will decrease.

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What would happen if the snakes were taken out of this food chain?

Clover → Grasshopper → Frog → Snake → Owl

• Clover would decrease.

• Frogs would increase.

• Grasshoppers would increase.

• Owls would increase.

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Look at the food chain below.

Which way does energy flow in the food chain?

• from the grass to the Sun

• from the owl to the mouse

• from the mouse to the grass

• from the grass to the mouse

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Use this food web to answer the question that follows.

If the spiders in this food web do not have enough to eat, it is probably because

• the grasshoppers do not have enough to eat.

• the snakes stop eating the grasshoppers.

• the number of birds increase.

• the birds stop eating the spiders.

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Below is an example of a food chain.

plant > grasshopper > frog > snake

If a group of foxes is introduced into this ecosystem and begins eating the frog population, what is one thing that will most likely happen in this food chain?

• There will be more grasshoppers in the area.

• There will be more snakes in the area.

• Snakes will begin to eat grasshoppers.

• Frogs will begin to eat plants.

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What two living things would be most hurt if mice got a disease and all died?

• Snakes and cats

• Wheat and snakes

• Wheat and corn

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Deer are plants-eaters. A winter storm kills many of the plants deer eat. The storm will most likely result in the deer

• shedding a lot of fur.

• traveling in a herd.

• becoming thin.

• feeding on meat.

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Which animals would most likely be helped by flood in a coastal area?

• deer

• raccoons

• alligators

• coyotes

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How are droughts always different from floods?

• They have different locations.

• They happen in different ecosystems.

• They have different amounts of water.

• They happen at different times of the year.

What does a fire take away from a forest that squirrels need to survive?

• food and soil

• food and shelter

• water and soil

• water and shelter

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