ENV: Chapter 11

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 what three things?

• river

• oceans

• streams

• lakes

Most of the oil that pollutes the ocean comes from

• spills from oil tankers

• runoff from towns and cities

The three major global uses of fresh water are 

• drinking, bathing, and growing crops

• residential, agricultural, and industrial use

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

• to filter and remove large organisms and trash

• to prevent bacterial growth and to remove unwanted gases

• to remove unwanted gases

How is fresh water used in industry? 

• in the disposal of waste products

• n manufacturing processes

• to generate power

• All

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

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

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

• Water the lawn daily and at mid-day

• Wash laundry in small, partial loads

Animal feces would be classified as which type of water pollutant?

• inorganic chemicals

• organic matter

• heavy metals

• norganic chemicals

Polluted groundwater is difficult to clean up because 

• the recycling process of groundwater can take hundreds or thousands of years

• groundwater is deep in the ground and dispersed through large areas of rock

• pollutants cling to the materials that make up the aquifer and contaminate the clean water

• All