| A | B |
| Source of the Earth's energy | sun |
| which air temperature can hold the most water | warm air |
| When the air temperature and dew point are close together | reater chance of precipitation |
| as relative humidity increases | air pressure decreases |
| as air pressure decreases | air temperature increases |
| formation of a cloud | water vapor, condensation nuclei, temperatures meeting the dew point |
| as air moves vertically what happens to temperature, pressure and dew point | decrease |
| wind vane | wind direction |
| barometer | air pressure |
| anemometer | wind speed |
| psychrometer | dew point and relative humidity |
| effect precipitation has on the atmosphere | cleans by removing dust |