| A | B |
|---|
| barometer | a tool that measures air pressure |
| hygrometer | a tool that measures humidity |
| air pressure | the amount that air presses on the earth |
| air mass | a large amount of air that has a certain temperature |
| wind vane | a tool that shows wind direction |
| precipitation | rain and snow are two kinds |
| meteorologist | a person who studies weather |
| rain gauge | measures the amount of precipitation |
| high-pressure area | a place where cool air is sinking |
| anemometer | a tool that measures wind speed |
| National Weather Service | provides meteorologists with weather information |
| low-pressure area | a place where warm air is rising |
| humidity | the amount of water vapor in the air |
| front | the line where two air masses meet |
| forecast | a prediction of what the weather will be like |
