| A | B |
|---|
| air that surrounds our planet | atmosphere |
| air particles pressing down on a surface | air pressure |
| layer of the atmosphere that is closet to Earth | troposphere |
| layer of the atmosphere just above most weather | stratosphere |
| describes how heat from the sun is trapped in the atmosphere to warm Earth | greenhouse effect |
| large body of sir that moisture content and temperature similar to the water or land over which it formed | air mass |
| border formed where a cold air mass and a warm air mass meet | front |
| instrument that measures air pressure | barometer |
| instrument that measures wind speed | anemometer |
| amount of water vapor in the air | humidity |
| thin, wispy clouds at high altitudes | cirrus |
| dark, towering clouds that bring heavy rain | cumulo-nimbus |
| thick, gray rain clouds near Earth's surface | stratus |
| puffy, white clouds at middle altitudes | cumulus |
