Water and Water Pollution Review

Question 1

For drinking water, the WHO recommends a level of ? coliform bacteria per 100 mL of water

Accepted Answer

0

Question 2

Sustainable use of water

Accepted Answer

might be encouraged by increasing the price of water, is discouraged by government subsidies of water.

Question 3

Dams

Accepted Answer

deprive downstream area of nutrients., inhibit migration of fish.

Question 4

Of the following sources of oil in the environment, the one which contributes least is

Accepted Answer

tanker accidents and blowouts at offshore drilling rigs.

Question 5

Which of the following uses tends to consume the smallest amount of water?

Accepted Answer

public use

Question 6

Thermal water pollution can be reduced by all of the following methods except

Accepted Answer

using more electricity.

Question 7

The majority of the oil pollution of the ocean comes from

Accepted Answer

runoff from land.

Question 8

Throughout the world, the most water is used for

Accepted Answer

irrigation

Question 9

Which of the following types of sewage treatment is properly matched?

Accepted Answer

advanced - physical and chemical processes

Question 10

Water can be scarce because of

Accepted Answer

dessication, water stress, dry climate, drought

Question 11

Groundwater depletion can be reduced by

Accepted Answer

controlling population growth., developing plant varieties that use less water.

Question 12

Water covers about _____% of Earth’s surface.

Accepted Answer

71

Question 13

Chesapeake Bay has been quite vulnerable to pollution because it is

Accepted Answer

shallow and flushes pollutants very slowly

Question 14

Which of the following statements about lakes is true?

Accepted Answer

Lakes are more vulnerable than streams to contamination

Question 15

The hydrologic cycle will naturally purify and recycle fresh water as long as humans don’t

Accepted Answer

all of these are true

Question 16

Water scarcity due to increasing numbers of people relying of fixed levels of runoff is called

Accepted Answer

water stress

Question 17

Farmers can sharply reduce fertilizer runoff by

Accepted Answer

planting buffer zones near surface water, using prescribed amounts of fertilizer., using slow-release fertilizers., planting nitrogen-fixing plants.

Question 18

Which of the following describes hypoxia?

Accepted Answer

lack of oxygen

Question 19

The greatest source of water pollution in terms of total mass is

Accepted Answer

sediments from erosion.

Question 20

Wasting water through irrigation could be reduced by

Accepted Answer

using organic farming techniques., using remote systems that monitor soil moisture., treating urban wastewater and using it for irrigation., using drought-resistant and salt-tolerant crops.

Question 21

Water

Accepted Answer

makes up most of living organisms., is essential to all life., helps to dilute pollutants., maintains Earth’s climate.

Question 22

Desalination

Accepted Answer

uses large amounts of energy, is expensive

Question 23

Water molecules _________ each other.

Accepted Answer

attract

Question 24

Which of the following is a point source of water pollution?

Accepted Answer

offshore oil wells

Question 25

The only effective way to protect groundwater is to

Accepted Answer

prevent contamination.

Question 26

Heat, organic wastes, and inorganic plant nutrients may all deplete dissolved _____ from water.

Accepted Answer

oxygen

Question 27

Humans increase the likelihood of flooding by

Accepted Answer

building on floodplains, removing water-absorbing vegetation, urbanization

Question 28

An indicator of good water quality would be a very low number of

Accepted Answer

coliform bacteria

Question 29

The most common reason for nonpoint source pollution to enter a watershed is

Accepted Answer

concrete

Question 30

Which of the following is a nonpoint source of water pollution?

Accepted Answer

a logged forest

Question 31

Water is wasted because

Accepted Answer

water prices are artificially low, outdated laws encourage water waste

Question 32

One class of pollutants that can cause a population explosion of aerobic bacteria is

Accepted Answer

oxygen-demanding wastes.

Question 33

Experts rate groundwater pollution as a

Accepted Answer

a low-risk ecological but high-risk health problem.

Question 34

The largest estuary in the United States is

Accepted Answer

Chesapeake Bay.

Question 35

One class of pollutants that can cause excessive growth of algae is

Accepted Answer

inorganic plant nutrients.

Question 36

Overuse of groundwater can lead to

Accepted Answer

saltwater intrusion., aquifer depletion., subsidence

Question 37

Water scarcity from drying up of the soil because of deforestation or overgrazing is called

Accepted Answer

dessication

Question 38

Which of the following statements is false?

Accepted Answer

Groundwater is stationary and does not move.

Question 39

Oxygen sag curves

Accepted Answer

may occur when oxygen-demanding wastes are added

Question 40

In cultural eutrophication, game fish die from

Accepted Answer

suffocation from lack of oxygen

Question 41

Approximately ____% of Earth’s water accessible fresh rather than salt water.

Accepted Answer

.02

Question 42

A body of water can be depleted of its oxygen by

Accepted Answer

organic wastes, which need aerobic bacteria to breakdown.

Water and Water Pollution Review

Questions 42

Water and Water Pollution Review

Questions 42