Exam 15: Water Resources

What percentage of the Earth's water is fresh water? 

More than half the water available for use is lost through evaporation,waste,irrigation,overuse,etc.

A large amount of the world's usable water comes from desalination.

Surface runoff from a basin will become groundwater when it infiltrates the ground.

Dams are relatively inexpensive to build.

____________________,which involves  planting only drought-resistant species in dry areas,sharply reduces water use on a site.

It is possible that countries in the Middle East may go to war over water resources.

What is one method for sustainable water use? 

Canada uses relatively little water for irrigation.

What is one means of reducing the amount of water that is wasted by irrigation? 

WATER -Which letter in the diagram corresponds to an area that replenishes an aquifer by surface runoff and infiltration?

In some countries,____________________ keep the price of water so low that users do not worry about water waste.

Increasing the price of water is likely to encourage the efficient use of water.

WATER -Which letter in the diagram corresponds to the system that is the most efficient way to deliver small amounts of water to crops by using a network of tubing installed at or below the ground level?

One in eleven people on Earth do not have access to safe drinking water.

Which activity consumes the largest amount of water in North American residences? 

What is illustrated by the majority of water-transfer projects? 

WATER -Which letter in the diagram corresponds to the system that is fairly efficient and uses pumps to spray water on a crop?

What water problem is particular to Canada?

Destroying vegetation can be an effective method of reducing the incidence and severity of flooding.