| A | B |
|---|
| Geothermal | Heat from below the surface of the earth |
| Air | A mixture of gases |
| Atmosphere | The blanket of air that surrounds the earth |
| Troposphere | The layer of the atmostphere that supports life and where weather occurs |
| Wind | The movement of the air |
| Stratosphere | The 2nd layer of the atmosphere above the earth |
| Nitrogen | A gas that makes up the largest portion of the air |
| Mesophere | The 3rd layer of the atmosphere above the earth |
| Thermosphere | The layer of the atmosphere that is farthest from the earth |
| Greenhouse Effect | Heat is trapped by the earth's atomosphere which warms up the air in the lower atmosphere |
| Oxygen | The gas in the air that makes up the 2nd largest portion of the atomosphere |
