| A | B |
|---|
| Layer of the atmosphere closest to the Earth? | troposphere |
| Layer of the thermosphere where electrically charged particles are found | ionosphere |
| Layer of the earth where air is warmed by heat from the Earths' surface | troposphere |
| Layer of the thermosphere extending outward into space | exosphere |
| The conditions of Earth's atmosphere at a particular time and place | weather |
| The layer of gases that surround Earth | atmosphere |
| The invisible, gaseous form of water | water vapor |
| The second-lowest layer of the atmosphere | stratosphere |
| The ozone layer is located in this layer | stratosphere |
| The middle layer of the Earth's atmosphere | mesosphere |
| Layer of the atmosphere where most meteoroids burn up | mesosphere |
| Life containing layer of the atmosphere | troposphere |
| 78% of the atmosphere is this gas | nitrogen |
| 21% of the atmosphere is this gas | oxygen |
| Trace gases found in our atmosphere | carbon dioxide, argon, krypton |
