Day 2 Ecosystems and Change

Why would an animal migrate, or go somewhere else, during the winter?

• To find food
• It has a new job.
• It wants a different home
• To go on vacation

If the population of prey increases, the population of predators will ________because of the availability of food.

• decrease
• stay the same
• increase

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
• organisms that eat the fish will become endangered
• people could eat too many fish and become ill

What would most likely happen if an ecosystem no longer received sunlight?

• The number of herbivores would increase
• The number of plants would increase
• all organisms would adapt
• All living organisms would eventually die

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Humans are part of the ecosystem and therefore impact it.  Which of the following events in an ecosystem may produce a negative effect?

• preventing deer from depleting food resources
• restoring a natural habitat
• wildlife rangers minimizing disturbances
• a lumber company clearing a forest

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 woudl eat too much.

A meadow has too many rabbits. What would help balance this ecosystem?

• more rain that grass needs
• more foxes that eat rabbits
• fewer foxes that eat rabbits
• more grass for the rabbits to eat

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What might be a reason an animal becomes extinct?

• It is a predator
• It produces oxygen.
• Its habitat is destroyed.
• It adapts to its environment.

A large amount of oil was spilled in a lake environment. Within a few weeks, the number of plants and animals living in the area where the oil was spilled will most likely.

• decrease 
• increase 
• remain the same 

The overpopulation of grazers can result in overgrazing. 

• True
• False