| A | B |
|---|
| Gaseous state of water found in the atmosphere. | water vapor |
| The most common gas in the air (78%).. | Nitrogen |
| The invisible ocean of air surrounding the Earth. | atmosphere |
| The inert (non-reative)gas in the air | argon |
| Gas that makes up 21% of the air. | Oxygen |
| The layer of the atmosphere that contains the protective ozone layer. | Stratosphere |
| Layer of the atmosphere in which all living things exist. | Troposphere |
| Consists of evaporation, condensation and precipitation. | water cycle |
| The unstable air currents caused by convection in the troposphere. | turbulence |
| The cycle of heating, rising, cooling and sinking of air in the Troposphere. | convection |
| Most satellites orbit the Earth in this layer of the atmosphere. | Exosphere |
| Layer of the atmosphere where the space shuttle orbits the Earth. | Thermosphere |
| The magnetic storm caused by the suns rays striking the atmosphere at an angle. | Aurorea Borealis |
| The amount of matter contained. | mass |
| The amount of mass in a given volume of air.. | density |
| The result of the weight of a column of air pushing down on an area. | air pressure |
| The distance above sea level. | altitude |
| The average level of the surface of the earth's oceans. | sea level |
| This caused our early atmosphere of Carbon dioxide and steam to be produced. | volcanic activity |
| Green plants produce oxygen in this process. | photosynthesis |
| Meteoroids burn up in this layer of the atmosphere. | Mesosphere |
