Question 1

Nitrates contaminate many wells in agricultural areas.Why?

Accepted Answer

Nitrates contaminate many wells in agric

Question 2

At any given time,what proportion of the world's hospital beds are occupied by people with waterborne diseases?

Accepted Answer

A) 20% 
B) 25% 
C) 50% 
D) 80% 
A) 20% 
B) 25% 
C) 50% 
D) 80%

Question 3

Dissolved oxygen is added to streams and rivers by

Accepted Answer

A) aerobic bacteria. 
B) waterfalls and rapids. 
C) decaying algae. 
D) fertilizer runoff. 
A) aerobic bacteria. 
B) waterfalls and rapids. 
C) decaying algae. 
D) fertilizer runoff.

Question 4

Which of the following uses the greatest amount of water in the United States?

Accepted Answer

A) agricultural irrigation 
B) cooling for electric power plants 
C) industrial manufacturing 
D) public water supplies 
A) agricultural irrigation 
B) cooling for electric power plants 
C) industrial manufacturing 
D) public water supplies

Question 5

Municipal water supplies are generally treated either with chlorine or with ozone.Which of the following statements is true?

Accepted Answer

A) Chlorine is more expensive. 
B) Ozone provides residual protection against microorganisms. 
C) Ozone does not kill viruses. 
D) Ozone is more expensive, but less of it is needed. 
A) Chlorine is more expensive. 
B) Ozone provides residual protection against microorganisms. 
C) Ozone does not kill viruses. 
D) Ozone is more expensive, but less of it is needed.

Question 6

How do the unique properties of water allow for life on Earth?

Accepted Answer

The unique properties of water allow for

Question 7

Heat capacity is a measure of the heat required to

Accepted Answer

A) expand the volume of a substance. 
B) evaporate a substance. 
C) freeze a substance. 
D) raise the temperature of 1 gram of a substance by 1°C. 
A) expand the volume of a substance. 
B) evaporate a substance. 
C) freeze a substance. 
D) raise the temperature of 1 gram of a substance by 1°C.

Question 8

Water has a relatively ________ heat capacity.

Accepted Answer

The answer of Water has a relatively ________ heat capacity....

Question 9

Most water bottles are recycled.

Accepted Answer

A) True 
 B)False

Question 10

Lakes and oceans affect climate by moderating variations in air temperature.The property of water moderating temperature variations is its

Accepted Answer

A) density. 
B) surface tension. 
C) boiling point. 
D) high heat of vaporization. 
A) density. 
B) surface tension. 
C) boiling point. 
D) high heat of vaporization.

Question 11

The Clean Water Act has had no impact on water quality over the past two decades.

Accepted Answer

A) True 
 B)False

Question 12

Which substance is likely to be produced when the dissolved oxygen in a lake is depleted?

Accepted Answer

A) methane 
B) hydrogen 
C) nitrite 
D) bicarbonate 
A) methane 
B) hydrogen 
C) nitrite 
D) bicarbonate

Question 13

Algae growth and death in a lake can increase the BOD of the water.This process is called

Accepted Answer

A) oxidation. 
B) fertilization. 
C) eutrophication. 
D) regeneration. 
A) oxidation. 
B) fertilization. 
C) eutrophication. 
D) regeneration.

Question 14

The heat capacity of water is ________ (greater/less)than that of ethanol.

Accepted Answer

The answer of The heat capacity of water is ________...

Question 15

The fastest growing segment of the beverage industry is bottled water.

Accepted Answer

A) True 
 B)False

Question 16

Most of the water available on the earth's surface is potable.

Accepted Answer

A) True 
 B)False

Question 17

Secondary treatment of sewage involves

Accepted Answer

A) filtering and aeration. 
B) settling and sludge removal. 
C) chlorination. 
D) Secondary sewage treatment involves all of the above. 
A) filtering and aeration. 
B) settling and sludge removal. 
C) chlorination. 
D) Secondary sewage treatment involves all of the above.

Question 18

Aerobic decomposition of organic matter requires

Accepted Answer

A) oxygen. 
B) nitrogen. 
C) magnesium. 
D) water. 
A) oxygen. 
B) nitrogen. 
C) magnesium. 
D) water.

Question 19

Phytoremediation is the use of plants to remove metals or other contaminants.

Accepted Answer

A) True 
 B)False

Question 20

Super bugs are

Accepted Answer

A) insects that can fly for a long time. 
B) organisms that are resistant to antibiotics. 
C) insects that are resistant to bug killer. 
D) insects that can fly to high altitudes. 
A) insects that can fly for a long time. 
B) organisms that are resistant to antibiotics. 
C) insects that are resistant to bug killer. 
D) insects that can fly to high altitudes.

Exam 14: Water

Nitrates contaminate many wells in agricultural areas.Why?

At any given time,what proportion of the world's hospital beds are occupied by people with waterborne diseases?

Dissolved oxygen is added to streams and rivers by

Which of the following uses the greatest amount of water in the United States?

Municipal water supplies are generally treated either with chlorine or with ozone.Which of the following statements is true?

How do the unique properties of water allow for life on Earth?

Heat capacity is a measure of the heat required to

Water has a relatively ________ heat capacity.

Most water bottles are recycled.

Lakes and oceans affect climate by moderating variations in air temperature.The property of water moderating temperature variations is its

The Clean Water Act has had no impact on water quality over the past two decades.

Which substance is likely to be produced when the dissolved oxygen in a lake is depleted?

Algae growth and death in a lake can increase the BOD of the water.This process is called

The heat capacity of water is ________ (greater/less)than that of ethanol.

The fastest growing segment of the beverage industry is bottled water.

Most of the water available on the earth's surface is potable.

Secondary treatment of sewage involves

Aerobic decomposition of organic matter requires

Phytoremediation is the use of plants to remove metals or other contaminants.

Super bugs are

Chemistry

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