| A | B |
|---|
| Precipitation | Water returns to Earth's in the form of rain, snow, etc. |
| Evaporation | Liquid water changes into a gas or water vapor |
| Condensation | Water vapor changes to a liquid |
| Humidity | Amount of moisture in the air |
| Rain Gauge | Container used to measure rainfall |
| Thunder | What occurs when there is a violent expansion of the air that has been heated by lightning |
| Air Pressure | Force of the air pressing down on Earth |
| Cumulus Clouds | Fluffy, white clouds resembling cotton |
| Cirrus Clouds | Feathery, wispy clouds made of ice crystals |
| Stratus Clouds | Gray blanket of clouds that usually cover the sky |
| Fog | Stratus cloud that form near the ground |
| Thunderstorm | Rainstorm with cumulonimbus clouds |
| Tornado | Funnel cloud moving over a narrow path of land |
| Lightning | Discharge or spark of electricity between two clouds or between cloud and ground |
| Hurricane | Large tropical storms with high winds, heavy rain, and storm surge |
| Blizzard | Winter snowstorm with blowing snow |
| Thermometer | A tube with alcohol or mercury used to measure temperature |
| Barometer | Instrument used to measure air pressure |
| Anemometer | Instrument used to measure wind speed |
| Weather Vane | Instrument used to determine wind direction |
| Weather Map | A "picture" of weather conditions in an area |
| Meteorologist | Scientist who studies the weather |
| National Weather Service | Government agency that issues safety advisories for severe weather |
| Climate | Average of all weather conditions of an area over a long period of time |
| Weather | The condition of the atmosphere at a given time and place |
