| A | B |
|---|
| microscopic organisms that float in the atmosphere | aeroplankton |
| mixture of gases surrounding the earth | atmosphere |
| superheated gases | plasma |
| force exerted by Earth's atmosphere at any given point | atmospheric pressure |
| three-atom form of oxygen gas that protects Earth from UV radiation | ozone |
| atom with an electrical charge that has gained or lost one or more electrons | ion |
| man-made compounds | CFCs |
| continuous flow of plasma from the sun | solar wind |
| ultraviolet radiation from the sun | UV |
