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1. Most of Earth's water is
a.
ice.
b.
fresh water.
c.
groundwater.
d.
salt water.
2. Most fresh water resources in the United States are used for
a.
recreation.
b.
household use.
c.
agriculture.
d.
industry.
3. The percentage of Earth's water that is available as fresh water for human use is
a.
less than 1 percent.
b.
about 5 percent.
c.
about 10 percent.
d.
about 20 percent.
4. Water vapor forms as a result of
a.
condensation.
b.
precipitation.
c.
evaporation.
d.
runoff.
5. The energy source driving the water cycle is
a.
ocean waves.
b.
the wind.
c.
the sun.
d.
gravity.
6. Smaller streams and rivers that feed into a main river are called
a.
watersheds.
b.
flood plains.
c.
tributaries.
d.
divides.
7. Which of these characteristics determines whether a body of water is a pond or a lake?
a.
size and depth
b.
salt content of water
c.
source of the water
d.
speed of flow
8. Which of the following is not an example of freshwater wetlands?
a.
marshes
b.
bogs
c.
swamps
d.
oceans
9. The layer of rocks and soil above the water table is called the
a.
saturated zone.
b.
unsaturated zone.
c.
impermeable layer.
d.
bedrock.
10. An underground layer of rock or sand that holds water is called a(n)
a.
artesian well.
b.
spring.
c.
aquifer.
d.
geyser.