| A | B |
|---|
| Insolation | amount of Sun's energy that reaches the earth at a given time and place. |
| atmosphere | the blanked of gases that surround the Earth. |
| troposphere | the layer of the atmosphere closest to the Earth's surface. |
| air pressure | the force put on a given area by the weight of the air above it. |
| weather | what the lower atmosphere is like at any given place and time. |
| barometer | a device for measuring air pressure |
