| A | B |
|---|
| Air Pressure | the force of air molecules pushing on an area |
| Barometer | any instrument that measures air pressure |
| Weather | the condition of earth's atmosphere at a particular time and place |
| Wind | air that moves horizontally |
| Wind | air that moves parallel to the ground |
| Global winds | travels thousands of kilometers in steady patterns |
| Coriolis effect | the influence the earth's rotation on the air or wind |
| The doldrums/horse latitudes | Calm regions |
| trade winds/easterlies/westerlies | wind belts |
| Jet streams | flows in the upper troposphere |
| Jet streams | travel from west to east |
| Local winds | Change daily in a regular pattern |
| monsoon | change direction with the seasons |
| evaporation | changes a liquid to a gas |
| condensation | changes a gas to a liquid |
| precipitation | any type of solid or liquid thta falls to earths surface |
| Humidity | amount of water vapor in the air |
| saturation | the rate of evaporation and condensation are equal |
| Relative humidity | compares amount of water vapor in air to max amount before saturation |
| dew point | the temperature at which air with a given amount of water vapor will reach saturation |
| cirrus | curl of hair |
| cumulus | heap |
| cumulus | pile |
| stratus | spread out |
| Fog | a cloud that rest on the ground or a body of water |
| freezing rain | covers ground with a coat of ice |
| rain | formed from liquid cloud droplets or ice crystals that melt |
| drizzle | formed from liquid cloud droplets or ice crystals that melt |
| sleet | ice pellets that form when rain freezes on the way down |
| snow | ice crystals that form and merge together in a cloud |
| Hail | balls of ice that is thrown around in a cloud by strong air currents |
| Hail | a record size of 1.7 lbs |
| Acid rain | becomes more acidic than usual because of pollution |
| Acid rain | gases combined with water vapor |
