Air particles pressing down on a surface

Layer of the atmosphere that is closest to Earth...

Layer of atmosphere just above most weather...

Describes how heat from the sun is trapped in the atmosphere to warm Earth...

large body of air that has moisture content and temperature similar to the water or land over which it formed...

border formed where a cold air mass and a warm air mass meet...

instrument that measures air pressure...

Instrument that measures humidity...

amount of water vapor in the air...

thin, wispy clouds at high altitudes...

dark, towering clouds that bring heavy rain...

thick, gray clouds near Earth's surface...

Puffy, white clouds at middle altitudes...

What are two properties that can be used to describe air masses?

In which layer of the atmosphere does most weather occur...

The cloud type that usually brings heavy rain is...

Warm air is...