| A | B |
|---|
| air masses | A large body of air that has the same characteristics throughout |
| air pressure | The weight of air pressing down on an area |
| front | The border between two air masses that collide |
| forecast | A prediction of upcoming weather |
| relative humidity | a comparison of the actual amount of moisture in the air to the greatest possible amount of moisture that could be in the air |
| weather balloon | object released into the atmosphere to help with forecast |
| thermosphere | The layer of the atmosphere furthest to Earth |
| troposphere | The layer of the atmosphere closest to Earth |
| surface map | map where conditions near the ground can be shown |
| station model | numbers and symbols that show the current weather conditions at a particular weather station |
| weather map | a map that shows recent weather conditions over a wide area |
| thunderstorm | strong storms that produce lighting and funnel clouds |
| hurricane | violent storms that rotates around a central eye |
| tropical storm | the beginning stage of a hurricane |
| tornado | rapidly swirling winds |
