Balanced Ecosystems
Organisms Interact
Environments Change
People Disturb the Balance
100
A meadow has too many rabbits. What would help balance this ecosystem?
More foxes that eat rabbits.
100
What impact does a parasite have in an ecosystem?
A parasite hurts one organism and helps another organism.
100
What would cause an ecosystem to change quickly?
earthquakes
100
How do people disturb the balance of ecosystems?
building houses
200
Describe a balanced ecosystem.
No animal or plant drives out other animals or plants.
200
What could scientists tell from a fish fossil found in a desert?
The desert was once a lake or sea.
200
Why do animals become extinct?
Its habitat is destroyed.
300
Why do chipmunks in the Great Smoky Mountains survive?
Their needs are met in that environment.
300
What might be the effect on an ecosystem of a climate change from rainy to dry?
A change in the kinds of plants and animals.
400
How would an ecosystem change if the rabbits that were the main prey for foxes became sick and died?
The number of foxes would decrease.
500
How are a hawk, and an owl able to succeed, even though they compete for food?
Hawks hunt during the day and owls hunt at night.
M
e
n
u