| A | B | 
|---|
| weather | Term describing the condition of the atmoshpere | 
| uneven heating of the earth | The cause of weather | 
| meteorology | The study of weather | 
| meteorologist | Scientist who predicts the weather | 
| weather forecast | Prediction of what the weather will be based on weather data from the past | 
| temperature | How much heat energy is in the atmosphere | 
| thermometer | Instrument to measure the temperature | 
| air pressure | The measure of the weight of the air | 
| barometer | Tool to measure air pressure | 
| fair weather | Type of weather usually produced by high air pressure | 
| cloudy, precipitation | Type of weather usually produced by low air pressure | 
| wind | Moving air | 
| wind vane | Tool to measure the direction of the wind | 
| anemometer | Tool to measure the speed of wind | 
| water vapor | Water in the form of gas in the air | 
| clouds | These are formed by water droplets | 
| precipitation | Water falling to the earth's surface | 
| rain gauge | Tool to measure precipitation | 
| rain | A name for liquid precipitation | 
| snow, sleet, hail | 3 names for frozen precipitation | 
| humidity | The amount of moisture [water vapor] in the air | 
| hygrometer | Tool to measure the amoun of water vapor in the air [humidity] | 
| front | A large mass of air with the same temperature and humidity | 
| cold front | Kind of front formed by cold air and produces violent storms | 
| warm front | Kind of front porduced by warm air, low flat clouds, and brings rain | 
| cirrus clouds | Clouds that look like feathers, fair weather first, then light rain or snow | 
| stratus clouds | Gray clouds that cover the sky, block the sun,  bring light rain | 
| cumulus clouds | Puffy white clouds with flat bottoms, bring fair weather | 
| thunderstorms | These result from a cold front sliding under a warm front; bring heavy rain and lightning | 
| tornado | A funnel cloud with low pressure and powerful winds | 
| hurricane | A huge thunderstorm over the ocean, with very strong winds and lots of rain | 
| low air pressure | Type of air pressure that brings clouds and precipitation | 
| high air pressure | Type of air pressure that brings fair weather |