Have an account?
Skip to Content
Build your own quiz
Suggestions for you
15 questions
Show Answers
See Preview
- 1. Multiple Choice
How long were the wolves absent from Yellowstone National Park?
1 year
5 years
10 years
70 years
- 2. Multiple Choice
Explain why the population of elk built up.
There were just a lot of them and so they reproduced quickly.
There was lots of food for the elk in the park so they reproduced well.
There was no natural predator to hunt them so they became over populated.
No one is actually sure why this happened.
- 3. Multiple Choice
What happened to the vegetation because of the elk population?
The elk ate it all, They reduced the vegetation to almost nothing, or they devoured it, leaving it bare.
Nothing at all. the vegetation just grew as normal.
A drought actually caused the vegetation to die and the elk trampled what was left.
The elk ate some of it but lots of the vegetation remained.
- 4. Multiple Choice
When were the wolves reintroduced?
1989
1886
2003
1995
- 5. Multiple Choice
Explain how the behavior of the elk changed in response to the wolves.
They did not change their behavior and therefore most elk died.
The elk stayed away from the areas the wolves were. As a result, the trees were able to grow again.
All the elk left the park and did not return.
The wolves were not able to capture the elk.
- 6. Multiple Choice
Why did the height of trees grow dramatically?
The weather had been much better and the trees grew taller.
The trees did not grow dramatically. Everything stayed the same.
The elk was not there to eat it, and now it can grow.
- 7. Multiple Choice
Song birds & migratory birds returned because...
They come back in the spring every year as normal.
They came to find shelter in trees, as there were more and taller trees.
They liked to follow the wolves and eat their left overs.
As the weather was much better, they enjoyed the park more.
- 8. Multiple Choice
Beavers returned because...
There were more trees. They like to build dams and eat trees. They build many habitats and niches for other animals
They liked the warmer temperatures in the park because of climate change.
They are carnivores and will eat the wolves.
They are carnivores and will eat the elk.
- 9. Multiple Choice
What is one way the rivers changed because of the wolves?
forest stabilized as there was less erosion
the rivers became bigger as more water flowed
less water flowed as the wolves caused a change in the climate
- 10. Multiple Choice
Choose the animals that benefited from the return of the wolves?
cows living the farms around the park
lions and tigers living in the park
elephants that were living in the park
fish, badgers and ravens living in the park
- 11. Multiple Choice
How would Yellowstone change if the wolves were removed again?
Everything would stay the same as the wolves had no effect.
Deer would come back to the areas they now avoid and overgraze on the vegetation.
The weather would change back to normal and it would be very cold.
More bears would populate the park
- 12. Multiple Choice
What did John Muir mean when he said, "When we try to pick out anything by itself, we find it hitched to everything else in the universe"?
Nothing in an ecosystem is connected to anything else. Each organism survives on its own.
Everything in a healthy ecosystem is connected, directly or indirectly, as evidenced by the wolves.
- 13. Multiple Choice
What is a tropic cascade?
an ecological process triggered by the removal or addition of a top predator that causes changes throughout the food chain.
an ecological process triggered by the removal or addition of a top predator that causes no changes throughout the food chain.
an ecological process triggered by the removal or addition of a vegetation that causes no changes throughout the food chain.
an ecological process triggered by the removal or addition of a primary consumer that causes changes throughout the food chain.
- 14. Multiple Choice
What is a niche in an ecosystem?
a pond or lake that is covered in algae
a system of interconnected parts that are living and non-living.
the place an organism lives or the function (job) of an organism within its ecosystem.
Another word for plants.
- 15. Multiple Choice
What is carrion?
dead, decaying animals.
a white bird native to North America.
The natural home or environment of the animal or plant.
to follow a winding course
- Answer choicesTagsAnswer choicesTags