Chapter 20- The Atmosphere and Environment

Air pollution

The presence in or introduction into the air of a substance which has harmful or poisonous effects.

Ozone layer

A layer in the stratosphere that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun.

Global warming

An increase in the average temperature of the earth's atmosphere.

Fractional distillation

Separation of a liquid mixture into fractions differing in boiling point.

pH of water

It also reduces ________ bodies and soil, harming aquatic and plant life.

Pollutants

Substances or chemicals that cause pollution.

Acid raid

Rainfall made so acidic by atmospheric pollution that it causes environmental harm.

Carbon cycle

Series of processes by which carbon compounds are interconverted in the environment.