| A | B |
|---|
| Process by which water returns to the earth's surface in the form of rain, snow, ect. | Precipitation |
| The process in which liquid water changes into a gas or water vapor | Evaporation |
| The process by which water vapor changes back to a liquid | Condensation |
| The amount of moisture in the air compared to the amount it can hold at a given temperature | Relative Humidity |
| This is used to measure rainfall | Rain Gauge |
| A large body of air with uniform properties throughout | Air Mass |
| A boundary that is formed when two air masses with different properties meet | Front |
| What occurs when there is a violent expansion of the air that has been heated by lightening | Thunder |
| A strong, narrow band of wind with very fast-moving air that moves across the United States from west to east | Jet Stream |
| A measure of the force of the air pressing down on the earth | Air Pressure |
| Fluffy, white clouds resembling balls of cotton that are usually associated with fair weather | Cumulus Clouds |
| Feathery, fibrous clouds made of ice crstals that are usually associated with fair weather | Cirrus Clouds |
| Thick, layered gray clouds that usually cover the sky in an even blanket and are usually associated with rain and snow | Stratus Clouds |
| What forms when condensed water from rivers, lakes, moist plants, or soil floats in the air near the ground | Fog |
| A form of air pollution appearing as a thick, brownish haze that is formed when carbon monoxide and other gases react in sunlight | Smog |
| A severe rainstorm that occurs when a cold front meets a warm front and cumulonimbus clouds form in the air | Thunderstorm |
| A destructive funnel cloud moving over a narrow path of land | Tornado |
| A sudden discharge or spark of electricity between two clouds or between a cloud and the ground | Lightning |
| Large tropical storms with high winds and heavy rain that can cause great damage as they move over land | Hurricane |
| A severe winter snowstorm that can cause near zero visibility with extremely low temperatures and high winds | Blizzard |
| A thick glass tube with a mercury or alcohol-filled bulb at one end that is used to measure the temperature | Thermometer |
| The instrument used to measure air pressure | Barometer |
| An instrument used to measure the speed of the wind | Anemometer |
| An instrument that can be used to determine the wind's direction | Weather Vane |
| A "picture" of weather conditions that a weather reporter uses as part of his or her forecast | Weather Map |
| A scientist who studies the weather in order to predict what the weather will be | Meterologist |
| An official government agency that issues advisories when severe weather has been observed or could occur | National Weather Services |
| The average of all weather conditions of an area over a long period of time | Climate |
| The heating of the earth's atmosphere caused by a buildup of carbon dioxide when humans burn excessive amounts of fossil fuels | Greenhouse Effect |
| The animal which, according to myth, cna forecast the weather by whether or not it sees its shadow on February 2 | Groundhog |
