Earth Science: The Water Planet, Book H

Section 2: Why is water necessary?

Self-Check Quiz-Eng.

1
The human body is nearly __________ percent water.
A)20
B)50
C)70
D)90
2
Water moves up plant stems by __________.
A)density
B)capillary action
C)gravity
D)polarity
3
About 41 percent of the water in the United States is used for __________.
A)agriculture
B)transportation
C)industry
D)household use
4
Water used for irrigation can come from all of the following EXCEPT __________.
A)lakes
B)rivers
C)clouds
D)underground
5
Boating and water skiing are examples of water used for __________.
A)transportation
B)production
C)recreation
D)agriculture
6
Approximately __________ percent of Earth's water is freshwater available for human use.
A)ten
B)90
C)one
D)99
7
Using less water when you shower is an example of water __________.
A)reuse
B)irrigation
C)flow
D)conservation
8
Mulching the ground around plants and installing drip tubes above plant roots are examples of conservation methods used in __________.
A)agriculture
B)mining
C)transportation
D)industry
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