| A | B |
|---|
| WEATHER | The conditions of Earth's atmosphere at a particular time and place. |
| ATMOSPHERE | The mixture of gases that surrounds Earth. The outermost of the four spheres into which scientists divide Earth. |
| WATER VAPOR | The invisible, gaseous form of water. |
| DENSITY | The amount of mass in a given space; mass per unit volume. |
| AIR PRESSURE | The weight of air pushing down on an area. |
| BAROMETER | An instrument used to measure changes in air pressure. |
| ALTITUDE | Elevation above sea level. |
| PRECIPITATION | State of water falling from the sky. |
| EVAPORATION | Process of liquid water changing to water vapor. |
| CONDENSATION | Process of water vapor cooling and changing into liquid. |
| SURFACE RUN-OFF | Movement of water from one area to another. |
| ACCUMULATION | Precipitation moving into areas of large bodies of water. |
| THE TEMPERATURE DECREASES AS ALTITUDE __?__ | Increases |
| LOW AIR PRESSURE IS CAUSED BY: | Warm air rising. |
| HIGH AIR PRESSURE IS CAUSED BY: | Cold air sinking. |
| GREENHOUSE EFFECT | Earth is heated by thermal energy trapped in atmosphere |
| GRAVITY | Holds atmosphere to the Earth. |
| THE HIGHER THE ALTITUDE THE __?__ PRESSURE | Lower |
| FORMAL NAME FOR WIND | Convection Current |
| WIND | Air pressure changes create this __?__ |
| TREND OF EARTH'S CLIMATE WARMNG | Global Warming theory |
