| A | B |
|---|
| Atmosphere | The thin layer of gases that surround the Earth. |
| CFCs (chlorofluorocarbons) | Human-made chemical compounds that are restricted in use because they destroy ozone. |
| Climate | The average weather in an area over a long period of time. |
| Global Warming | Predicted increase in Earth's temperature due to an increase in greenhouse gases in the atmpsphere. |
| Greenhouse Effect | Warming effect on the air caused by heat rising from the surface of the Earth and being trapped by gasses in the troposphere. |
| Greenhouse Gases | The gases in the atmosphere that trap and radiate heat. |
| Ozone | Form of oxygen with molecules made of three oxygen atoms. |
| Stratosphere | One of the five layers of the atmosphere, lying immediately above the troposphere and extending from 10 km to about 50 km above the Earth's surface. |
| Troposphere | One of the five layers of the atmosphere, extending from earth's surface to about 10 km above the surface. |
| Weather | Conditions in the atmosphere at a particular place and particular moment. |
