Earth's Atmosphere: Study Guide

_____ is the most abundant gas in the atmosphere.

____ forms when lightning interacts with oxygen in the air.

The ____ layer protects Earth from getting hit by most meteoroids.

As altitude above Earth increases, air pressure ___.

The main layers of the atmosphere are classified according to changes in ____ and _____.

Air pressure is measured by an instrument called a/an ____.

The ____ helps protect Earth from too much ultraviolet (UV) radiation because it contains ozone.

Global and local winds are different except they ____.

Trade Winds and Prevailing Westerlies differ in the ____.

In 1970, the US government set air quality standards called the