| A | B |
|---|
| Temperature | the measure of the amount of heat energy in the atmosphere |
| air pressure | due to the weight of the air and is determined by several factors including the temperature of the air |
| front | the boundary between air masses of different temperature and humidity |
| cirrus clouds | feathery clouds. - fair weather. Cirrus clouds often indicate that rain or snow will fall within several hours. |
| stratus clouds | smooth, gray - produce light rain |
| cumulus clouds | fluffy and white with flat bottoms. They usually indicate fair weather. |
| cumulonimbus clouds | Towering cumulus clouds that are larger and darker on the bottom; produce thunderstorms. |
| Barometer | measures air pressure |
| Anemometer | measures wind speed |
| Thermometer | measures the temperature of the air |
| Meteorologist | gather data by using a variety of instruments; use data to predict weather patterns |
| Thunderstorm | a storm with lightning and thunder |
| Hurricane | a violent |
| Tornado | a rotating column of air ranging in width from a few yards to more than a mile and whirling at destructively high speeds |
| Weather | state of the atmosphere at a given time |
| low pressure area | an area where warm air rises and pushes down on the earth’s surface with less pressure |
| high pressure area | an area where cold air sinks and pushes down on the earth’s surface with more pressure |
| wind vane | a tool that shows wind direction |
| precipitation | moisture that falls to the ground from clouds; examples: rain |
| evaporation | the changing of a liquid into a gas |
| condensation | the changing of a gas into a liquid |
| humidity | the amount of water vapor in the air |
| air mass | a large amount of air that has the same temperature and humidity |
| forecast | a prediction of what the weather will be |
| typhoon | a tropical storm that occurs in the western pacific or Indian Oceans |
| climate | the average weather and temperature of a certain area over a long period of time |
