The Water We Use — Unit test Answers

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Access to potable water is most heavily limited by _______.

A
money
B
precipitation
C
raw water supplies
D
climate
5

Human activity on land can have a profound influence on marine ecosystems.

A
T
B
F
6

Potable water delivery systems are characterized by _______.

A
high infrastructure costs
B
aqueducts
C
glass bottles
D
rivers
7

The Karez well system _______.

A
was the first known use of wells
B
was a postindustrial system
C
transported groundwater from a distance
D
all of the above
10

Where is the water table located?

A
10 ft below the surface
B
below the saturated zone
C
at the top of the saturated zone
D
all of the above
12

Which of the following is true of salt lakes?

A
The water flowing in to salt lakes comes directly from the ocean.
B
Salt lakes are formed when river bends are cut off.
C
The water flowing in to salt lakes contains minerals.
D
Salt lakes do not experience shrinking due to erosion.
13

Which of the following oceans lies between North America, South America, Europe and Africa?

A
Pacific Ocean
B
Atlantic Ocean
C
Southern Ocean
D
Arctic Ocean
14

What is the greatest use of groundwater?

A
drinking
B
industry
C
agriculture
D
recreation
15

Which of the following practices could help reduce erosion of water banks?

A
buffer strips
B
natural fertilizers and pesticides
C
decrease in fossil fuel emissions
D
all of the above
16

Which of the following is not an option for solving the world water crisis?

A
desalination
B
finding new sources of freshwater
C
reducing overconsumption
D
wastewater treatment plants
18

Please select the word from the list that best fits the definition

A
gravity
B
high tide
C
low tide
D
moon
E
neap tide
F
spring tide
G
sun
H
tidal bore
I
tidal range
J
tides
19

If the wavelength of a wave stays the same, what happens when the wave period increases?

A
increase in wave speed
B
increase in wave height
C
decrease in wave speed
D
decrease in wave height
20

A river system is made up of a river and its

A
sediments.
B
divides.
C
runoff.
D
tributaries.

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