| A | B |
|---|
| atmosphere | condition of the earth's air. |
| water cycle | The path that water takes on earth. |
| evaporation | A liquid turning into a gas when heat has been added. |
| percipitation | The water that falls back down to earth when the clouds can no longer be suspended in the air. |
| condensation | A gas turning into a liquid when cold in added. |
| troposphere | The layer of the atmosphere closest to the earth. |
| stratosphere | The second layer of the earth's atmosphere that blocks out harmful ultra-rays. |
| mesosphere | The middle layer of the earth atmosphere. It is here that that harmful gamma radiation is blocked. |
| thermosphere | The highest layer of the earth's atmosphere. |
