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- 1. Multiple Choice
Field mice eat corn. Which would most likely happen if the field mouse population grew?
There would be more corn to feed the field mice.
There would be less corn due to the mice eating it.
The habitat would get overpopulated because the mice would eat too much.
There would be no change
- 2. Multiple Choice
Humans are part of the ecosystem and therefore impact it. Which of the following events in an ecosystem may produce a negative effect?
A lumber company clearing a forest
preventing deer from depleting food resources
Wildlife ranger minimizing disturbances
Restoring a natural habitat
- 3. Multiple Choice
Farmers in the middle section of the country grow crops that feed many people. Suppose that over a period of several years the region receives far less rainfall than normal, reducing the size of crops grown in the area. The lack of precipitation in an area over a prolonged period of time is a ____________.
Desert
Deposition
Drought
Monsoon
- 4. Multiple Choice
How does too much fishing in an area affect its ecosystem?
The fish will lay many more eggs to replace fish caught.
Organisms that eat fish could become endangered due to starvation
There will be no change in organism that eat fish
People could eat too many fish and become ill
- 5. Multiple Choice
A hurricane sweeps across a small Caribbean island, killing 50% of the herbivore species on the island. Which of the following is the most immediate result?
A reduction in biodiversity
An increase in predator populations
An acceleration of the carbon cycle
A decline in decomposer populations
- 6. Multiple Choice
Which is NOT an example of a natural environmental change?
Flooding
Hurricane
A volcanic eruption
A housing development
- 7. Multiple Choice
Burning fossil fuels adds carbon dioxide to the air. What could be done to reduce the amount of carbon dioxide and increase the amount of oxygen in areas where fossil fuels are burned?
Driving cars
Burning our trash
Building houses
Planting trees
- 8. Multiple Choice
How can humans best help an endangered species avoid extinction?
They can feed the animals
They can put the animals in a zoo
They can protect the animal's habitat
They can take the animal to new habitats
- 9. Multiple Choice
What is one way an animal can change the ecosystem?
Chipmunks can hibernate through winter
Arctic foxes fur changes from brown to white in the winter
Salmon migrate to lay their eggs
Beavers build a dam on a stream to create their homes
- 10. Multiple Choice
What is one negative way people can change ecosystems?
breathing air
building a house
riding a bike
playing soccer
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