Vocabulary Cards

*Measuring Weather

*Air pressure

The amount that air presses or pushes on anything.

*Low-pressure area

A place where warm air rises and pushes down on the earth’s surface with less pressure

*High-pressure area

A place where cool air sinks and pushes down on the earth’s surface with more pressure

*barometer

A tool that measures air pressure

*Wind vane

A tool that shows wind direction

*anemometer

A tool that measures wind speed

*precipitation

Moisture that falls from clouds to the ground

*Rain gauge

A tool that measures precipitation

*humidity

The amount of water vapor in the air

*hygrometer

A tool that measures humidity

*Air mass

A large body of air that has about the same temperature and humidity

*front

The line where two air masses meet

*forecast

A prediction of what the weather will be like

*meteorologist

A person who studies weather

*National Weather Service

A government agency that collects information about weather