| A | B |
|---|
| Forecast | To predict weather conditons |
| Air Mass | Large areas of air that have nearly the same properties |
| Front | The boudary betweeen two air masses |
| Cold Front | When cold air is pushed into warm air |
| Warm Front | When warm air pushes into cold air |
| Stationary Front | The boundary between two air masses that are not moving |
| Temperature | How hot or cold the air is |
| Humidity | The amount of water vapor in the air |
| Air Pressure | The force of air pushing on an area |
| Precipitation | Any form of water that falls from the clouds |
| rain gauge | A tool that collects rainfall |
| barometer | A tool that measures air pressure |
| Rain | Liquid water precipitation |
| Sleet | Freezing rain |
| snow | Frozen water crystals |
| Thermometer | A tool that measures air temperature |
| Hail | Ice pellets |
| wind vane | A tool that points in the direction that the wind is blowing |
