Unit 11 Review

Ninety-Seven percent of the world's water resources are found in

• Fresh water

• Salt Water

• Icecaps and glaciers

• Groundwater

Earth’s surface water is found in

• Lakes

• Rivers

• Streams

• All of the above

Most of the oil that pollutes the ocean comes from

• Operating boats and personal watercract

• Spills from oil tankers

• Runoff from cities and towns

• Leaking underground storage facilities

The three major global uses of fresh water are

• manufacturing goods, wastewater disposal, and irrigation.

• drinking, bathing, and growing crops.

• drinking, manufacturing goods, and generating power.

• residential, agricultural, and industrial uses.

What is the purpose of adding alum to water during the water treatment process?

• To filter and remove large organisms and trash

• To form flocs that bacteria and other impurities will cling to

• To prevent bacterial growth

• To remove unwanted gases

How is fresh water used in industry?

• in manufacturing processes

• In the disposal of waste products

• to generate power

• all of the above

Many areas of the world that do not have adequate fresh water have become habitable because

• Rainfall patterns have changed

• water management projects have diverted water to the areas

• icebergs have been towed in to provide fresh water

• people have practiced water conservation

A hole that is dug into the ground to obtain fresh water is called

• the recharge zone

• a well

• an aquifer

• a watershed

Which of the following is one way that a person can conserve water?

• Take a bath instead of a shower

• Wash laundry in small, partial loads

• Use a low-flow shower head and take short showers

• Water the lawn daily and at mid-day

Animal feces would be classified as which type of water pollutant

• Pathogens

• Organic matter

• Inorganic chemicals

• Heavy metals