| A | B |
|---|
| atmosphere | a thick layer of gases, water, and small solid particles that surrounds the earth |
| radiation | energy that travels through space in the form of waves |
| air pressure | the force of air pressing on the earth |
| barometer | an instrument used to measure air pressure |
| sea breeze | wind that blows from the water toward the land |
| land breeze | wind that blows from the land toward the water |
| water vapor | water in the form of an invisible gas |
| humidity | water vapor in the air |
| relative humidity | the amount of water vapor in the air compared with the amount of water vapor the air could hold if it were full |
| dewpoint | the temperature at which water vapor in the air condenses |
