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Test Ch 12
Test Description: T2Q3
Instructions: Answer all questions to get your test result.
1) What is the most important use of water in your daily life?
A
moving nutrients through your body
B
irrigating the food crops that you eat
C
washing cars
D
transporting products you use each day
2) Which of these could cause excess nutrients to enter a river or lake?
A
desalination plants
B
locks
C
aquaculture
D
drought
3) A pollutant that enters a body of water from a known source is a point-source pollutant
A
False
B
True
4) A pollutant is the amount of a substance that is in another substance.
A
False
B
True
5) Which of these would be used to treat the wastewater in a large city?
A
septic system
B
desalination plant
C
hydroelectric dam
D
sewer system
6) Which of these is a good way to conserve water at home?
A
Run the clothes washer only when it is full.
B
Install a septic system.
C
Drink less water than your body needs.
D
Water the grass only when the Sun is shining.
7) Why are freshwater shortages a global problem?
A
There is less water in the water cycle today than in the past.
B
Wastewater can't be treated quickly enough to meet demands.
C
The human population is decreasing.
D
The human population is increasing.
8) Which of these can cause water shortages anywhere on Earth?
A
drought and desalination
B
drought and overuse
C
desalination and overuse
D
conservation and overuse
9) Which of these is the best example of balancing water needs and conservation?
A
making products that use toxic materials
B
using drip irrigation systems
C
selling fresh water to places that need it
D
building swimming pools in hot climates
10) What are two possible solutions to shortages of fresh water?
A
icebergs and irrigation
B
irrigation and overuse
C
desalination and conservation
D
aquaculture and desalination
11) Why is water so important to life on Earth?
A
It is necessary for most life functions.
B
It is the only substance that cycles among Earth's spheres.
C
It is critical to industry, agriculture, and recreation.
D
It is the only substance that exists as a solid, liquid, and gas.
12) Which of these would be the most effective way for a farmer to produce food for the global population yet still conserve water?
A
Use untreated wastewater to irrigate crops.
B
Withdraw water from nearby rivers and lakes.
C
Use spray irrigation.
D
Use drip irrigation.
13) What is the purpose of using sand, gravel, and chlorine during drinking water treatment?
A
Sand and gravel cause dirt and bacteria to stick together; chlorine kills all bacteria in the water.
B
Sand and gravel filter dirt from the water; chlorine kills some of the bacteria in the water.
C
Chlorine removes dirt from the water; sand and gravel kill some of the bacteria in the water.
D
Chlorine causes dirt and bacteria to stick together; sand and gravel remove bacteria from the water.
14) Which of these would be the most practical method for treating the water used at a large rural school?
A
a city sewer system
B
a hydroelectric dam
C
a desalination plant
D
a septic tank
15) What causes most pollution of fresh water?
A
broken septic systems on small farms
B
untreated wastewater from city sewage systems
C
ships that spill or dump their fuel into local rivers
D
runoff carrying chemicals into water bodies
16) What condition exists during a drought?
A
a long period of lower than normal temperature
B
a long period of higher than normal temperature
C
a long period of higher than normal rainfall
D
a long period of lower than normal rainfall
17) How do countries limit the pollution of fresh water?
A
by banning irrigation
B
by building dams
C
by desalinating seawater
D
by making laws and treaties
18) About how much of Earth's surface is covered by water?
A
50 percent
B
75 percent
C
3 percent
D
30 percent
19) Where does fresh water exist on Earth's surface?
A
oceans, rivers, and ponds
B
oceans, rivers, and aquifers
C
lakes, rivers, and ponds
D
lakes, rivers, and aquifers
20) Why are aquifers important?
A
They hold more water than people could ever use.
B
They are sources of fresh water for much of the human population.
C
They hold water much longer than most lakes on Earth.
D
They are found only beneath deserts, where fresh water is scarce.
*select an answer for all questions
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