Question 1

Experts suggest that, worldwide, ____________________ of the water people use is wasted through evaporation, leaks, and other losses.

Accepted Answer

The answer of Experts suggest that, worldwide, ____________________ of the...

Question 2

Which of the following is not true of the Colorado River basin?

Accepted Answer

A) much needed sediment is washed to coastal wetlands 
B) 80% of water withdrawn from the Colorado River goes to irrigation 
C) government subsidies have led to inefficient use of irrigation water 
D) water is leaking to the ground below the river 
E) there is a high evaporation rate 
A) much needed sediment is washed to coastal wetlands 
B) 80% of water withdrawn from the Colorado River goes to irrigation 
C) government subsidies have led to inefficient use of irrigation water 
D) water is leaking to the ground below the river 
E) there is a high evaporation rate

Question 3

If irrigation was just ____________________% more efficient, there would be enough water for domestic and industrial uses in southern California.

Accepted Answer

The answer of If irrigation was just ____________________% more efficient,...

Question 4

The above diagram points to the advantages (A─E) and the disadvantages (F─J) of large dams and reservoirs.Correctly identify and each of the five advantages (A─E) and disadvantages (F─J) of such large dams and reservoirs as indicated on the diagram.
-Risk of failure and devastating downstream flooding.

Accepted Answer

The answer of   
The above diagram points to...

Question 5

Floods cause tremendous property damage and kill large numbers of people each year.Why does this happen every year, and is there anything that can be done about it?

Accepted Answer

Significant numbers of people live in fl

Question 6

The Colorado River provides water and electricity to what percentage of the U.S.population?

Accepted Answer

A) 2% 
B) 5% 
C) 8% 
D) 10% 
E) 15% 
A) 2% 
B) 5% 
C) 8% 
D) 10% 
E) 15%

Question 7

Precipitation that does not infiltrate the ground, or evaporate, is called ____________________.

Accepted Answer

The answer of Precipitation that does not infiltrate the ground,...

Question 8

What percentage of China's major cities are already facing water shortages?

Accepted Answer

A) 25% 
B) 33% 
C) 50% 
D) 67% 
E) 100% 
A) 25% 
B) 33% 
C) 50% 
D) 67% 
E) 100%

Question 9

Desalination is practical only for rich, water-poor countries.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is not true of the disaster that befell the Aral Sea?

Accepted Answer

A) Surface level of the sea has dropped by 22 meters. 
B) Caused by a water diversion project. 
C) Shrinkage of the Aral Sea has altered local climate. 
D) Populations of local animal species have remained stable. 
E) Salt and sand from the dry sea bottom spread as far as 300 kilometers. 
A) Surface level of the sea has dropped by 22 meters. 
B) Caused by a water diversion project. 
C) Shrinkage of the Aral Sea has altered local climate. 
D) Populations of local animal species have remained stable. 
E) Salt and sand from the dry sea bottom spread as far as 300 kilometers.

Question 11

Which of the following is the most efficient means of water delivery to crops?

Accepted Answer

A) center-pivot sprinkler systems 
B) low-energy precision-application (LEP
A)  sprinkler systems 
C) trickle or drip irrigation 
D) gravity-flow canal systems 
E) diagonal-pivot systems 
A) center-pivot sprinkler systems 
B) low-energy precision-application (LEP
A)  sprinkler systems 
C) trickle or drip irrigation 
D) gravity-flow canal systems 
E) diagonal-pivot systems

Question 12

Israel has the world's largest number of desalination plants.

Accepted Answer

A) True 
 B)False

Question 13

Many people living in arid southern California cities may have to move elsewhere because of water shortages in this century.

Accepted Answer

A) True 
 B)False

Question 14

Water in reservoirs behind dams now hold 50 times more water than the total amount flowing in all of the world's natural rivers.

Accepted Answer

A) True 
 B)False

Question 15

Flood irrigation is the most efficient method of delivering water needed for crops.

Accepted Answer

A) True 
 B)False

Question 16

What percentage of the earth's surface is covered by water?

Accepted Answer

A) 86% 
B) 71% 
C) 67% 
D) 58% 
E) 52% 
A) 86% 
B) 71% 
C) 67% 
D) 58% 
E) 52%

Question 17

Below the relatively dry soil close to the earth's surface, the spaces in the soil, gravel, and rock are filled with water and called the water table.

Accepted Answer

A) True 
 B)False

Question 18

The United States is withdrawing groundwater from aquifers at a rate that is ____ times faster than it can be recharged.

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 10 
A) 2 
B) 3 
C) 4 
D) 5 
E) 10

Question 19

In the United States, approximately one-half of the water used comes from groundwater sources and the other one-half from surface sources.

Accepted Answer

A) True 
 B)False

Question 20

Microirrigation is the most efficient way to deliver small amounts of water to crops.

Accepted Answer

A) True 
 B)False

Exam 13: Water Resources

Experts suggest that, worldwide, ____________________ of the water people use is wasted through evaporation, leaks, and other losses.

Which of the following is not true of the Colorado River basin?

If irrigation was just ____________________% more efficient, there would be enough water for domestic and industrial uses in southern California.

Floods cause tremendous property damage and kill large numbers of people each year.Why does this happen every year, and is there anything that can be done about it?

The Colorado River provides water and electricity to what percentage of the U.S.population?

Precipitation that does not infiltrate the ground, or evaporate, is called ____________________.

What percentage of China's major cities are already facing water shortages?

Desalination is practical only for rich, water-poor countries.

Which of the following is not true of the disaster that befell the Aral Sea?

Which of the following is the most efficient means of water delivery to crops?

Israel has the world's largest number of desalination plants.

Many people living in arid southern California cities may have to move elsewhere because of water shortages in this century.

Water in reservoirs behind dams now hold 50 times more water than the total amount flowing in all of the world's natural rivers.

Flood irrigation is the most efficient method of delivering water needed for crops.

What percentage of the earth's surface is covered by water?

Below the relatively dry soil close to the earth's surface, the spaces in the soil, gravel, and rock are filled with water and called the water table.

The United States is withdrawing groundwater from aquifers at a rate that is ____ times faster than it can be recharged.

In the United States, approximately one-half of the water used comes from groundwater sources and the other one-half from surface sources.

Microirrigation is the most efficient way to deliver small amounts of water to crops.

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