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WorksheetsScience Less. 7-5: How do ecosystems change?
Total questions: 12
Worksheet time: 12mins
Name
Class
Date
1.
Which of the following causes a slow change to an ecosystem?
a)
fire
b)
earthquake
c)
change in climate
d)
flooding
2.
A series of predictable changes in an ecosystem over time is called __________.
a)
symbiosis
b)
succession
c)
ecology
d)
predictable ecosystem theory
3.
What is the first organism to appear after an ecosystem has been destroyed?
a)
succession species
b)
succession plants
c)
pioneer species
d)
succession producers
4.
What is the problem with using landfills?
a)
leaking hazardous wastes damage ecosystems
b)
some organisms will die because the land changes
c)
they are almost full
d)
all of the above
5.
The best solution to pollution is __________.
a)
cleaning it up
b)
hiring other countries to clean it up
c)
preventing it from happening in the first place
d)
using Dawn dish washing liquid and a sponge
6.
A family is cleaning up after a picnic. One child starts to throw away the plastic forks. The mother says, "No, we'll take them home and wash them." Explain her decision.
a)
The mother wants to use the forks to help make sand castles.
b)
The mother wants to throw them away at home rather than fill up the park's waste cans.
c)
The mother wants to reuse the forks and use them again to conserve natural resources.
d)
The mother wants to return the forks to the store and get her money back.
7.
A beaver cutting down trees to form a dam is an example of succession.
a)
True
b)
False
8.
Carbon dioxide is produced when humans burn fossil fuels.
a)
True
b)
False
9.
Overgrazing by cattle can cause harm to an ecosystem.
a)
True
b)
False
10.
Humans can prevent damage to ecosystems through being informed.
a)
True
b)
False
11.
When different species with similar needs live in an ecosystem with limited resources, what will happen?
a)
They will live together peacefully.
b)
They will compete for available resources.
c)
Some organisms will become prey and eat other organisms.
d)
One species will adapt so that they will have different needs.
12.
Which is a way humans create changes in their ecosystem?
a)
Humans create air pollutants when thy burn fossil fuels. This changes the environment and can damage the health of both plants and animals. As producers die off, the number of consumer must also become smaller.
b)
Humans also use many more resource than other species do. Many of these rescources are not renewable and will eventually run out.
c)
All of the above.
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