| A | B |
|---|
| air pressure | push of air in all directions against its surroundings |
| barometer | device used to measure air pressure |
| cirrus cloud | light, feathery cloud made up of ice crystals high in the sky |
| cloud | mass of tiny droplets of water that condensed from the air |
| condense | change from a gas to a liquid |
| cumulus cloud | large puffy cloud |
| evaporate | change from a liquid to a gas |
| flash flood | sudden, violent flood |
| fog | cloud that touches Earth's surface |
| high pressure area | area of higher air pressure than that of the surrounding air |
| humidity | amount of water vapor in the air |
| hurricane | large, violent storm accompanied by strong winds & usually, heavy rain |
| low-pressure area | area of lower air pressure than that of the surrounding air |
| precipitation | any form of water that falls from clouds to Earth's surface |
| rain gauge | device for measuring precipitation |
| relative humidity | amount of water vapor present in the air at a given temperature compared to the maximum amount that the air could hold at that temperature |
| stratus cloud | low, flat cloud that often brings drizzle |
| thunderstorm | storm that produces lightning & thunder & often heavy rain &strong winds |
| tornado | violent, funnel-shaped storm of spinning wind |
| water cycle | movement of water into the air as water vapor & back to Earth's surface as rain, snow, or hail |
| weather satellite | human-made device in space that takes pictures of Earth & collects information about the weather |
| wind | movement of air over Eath's surface |
