Environmental Science CDE - Chapter 5

Most of Earth's surface is covered with ...

a. crops

b. farms

c. trees

d. water

D

The bodies of plants, animals, and humans consist of approximately what percentage of water?

a. 10 percent

b. 40 percent

c. 70 percent

d. 90 percent

D

substances that dissolve readily in water to form simple ions are called...

a. salts

B. potable

c. organics

d. insoluble

A

The universal solvent is...

a. gasoline

b. paint thinner

c. varsol

d. water

D

The content of ocean water may be likened to...

a. fresh water

b. pure water

c. thin soup

d. varsol

C

The process by which water changes from liquid form to a vapor or gas is...

a. precipitation

b. evaporation

c. distillation

d. condensation

B

The function of a watershed is to...

a. protect potable water tanks from the weather

b. release a consistent flow of water throughout the year

c. shelter a water pump

d. protect water from contaminants

B

Which of the following is not a function of a wetland?

a. a safe dumpsite for leftover farm and garden chemicals

b. natural water-treatment site for nitrates and phosphates

c. migratory bird refuge

d. sediment filtering from surface water

A

Groundwater that is unavailable for plant root absorption is called...

a. capillary water

b. free water

c. gravitational water

d. hygroscopic water

C

Improved water quality can be achieved by...

a. appropriate use of water

b. careful water storage and handling

c. proper land management

d. all of the above

D

Which of the following is not true about water?

a. composed of two atoms of hydrogen and one of oxygen

b. universal solvent

c. freezes at 0* F

d. covers 70 percent of the Earth's surface

C

A pH of 7 is...

a. basic

b. neutral

c. acidic

d. 7 ppm

B

A measurement of the total concentration of ions in water is...

a. salinity

b. temperature

c. acidity

d. alkalinity

A