| A | B |
|---|
| Outer Space | at least 100 miles above the Earth where there is no atmosphere |
| Stratosphere | Air is very thin here and jets leave their white vapor trail |
| Troposphere | The atmosphere that surrounds us with the blue sky and the air we breathe |
| Crust | The Earth we live on. It is 50 miles thick. |
| Magma | The molten rock below the earth's surface. |
| Lava | Molten rock that has reached the earth's surface and has mixed with air |
| Mantle | The layer below the crust. Rocks are gooey and very hot |
| Outer core | The largest layer within the earth. |
| Inner core | A huge ball of pressurized molten rock |
| Pangea | Before there were seven continents. There was but one |
