How Wolves Change Rivers - G5 & G6

The number of deer increased after the reintroduction of wolves because they had more food available.

• True

• False

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When were wolves reintroduced?

• 1925

• 1985

• 1995

How long had the wolves been absent?

• 20 years

• 60 years

• 70 years

How did the behaviour of deer change after the reintroduction of wolves?

• They did not eat any more grass.

• They did not go to some parts of the park any more.

• They did not have so many offspring.

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What happened to the height of trees?

• It was multiplied by 5 times.

• It was lower because the deer ate the leaves.

• Nothing at all.

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Why did beavers come?

• Because the water was clearer

• Because they like to eat trees

• Because beavers always come where there is water

Why were there more rabbits?

• Because wolves don't eat rabbits

• Because the wolves killed the coyotes

• Because the rabbits eat the grass left by the deer

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Why did the rivers change?

• Because the forests stabilized the land at the banks

• Because it started to rain more

• Because the wolves killed the coyotes

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Apart from the ecosystem, what else did the wolves do?

• They killed all the deer.

• They changed the mountains.

• They changed the geography.

What is the conclusion we get after watching the video?

• Wolves are not so bad even though they hunt deer.

• The rivers are controlled by wolves.

• A small change in the ecosystem can mean a lot in nature because we are all connected.

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