| Heat | Energy that is transferred as a consequence of temperature differences. |
| Jet Streams | Narrow bands of high-speed winds that circle the earth blowing from West to East. |
| Troposphere | The region of the atmosphere that extends from ground level to roughly 11 kilometres (7 miles) above sea level. |
| Atmosphere | The mass of air surrounding a planet. |
| Atmospheric Pressure | The pressure exerted by the atmosphere on all objects within it. |
| Barometer | An instrument used to measure atmospheric pressure. |
| Temperature | A measure of the energy of random motion in a substance’s molecules. |
| Homosphere | The lower layer of earth’s atmosphere, which exists from ground level to roughly 80 kilometres (50 miles) above sea level. |
| Heterosphere | The upper layer of earth’s atmosphere, which exists higher than roughly 80 kilometres (50 miles) above sea level. |
| Stratosphere | The region of the atmosphere that spans altitudes of roughly 11 kilometres to 48 kilometres (30 miles). |
| Mesosphere | The region of the atmosphere that spans altitudes of roughly 48 kilometres to 80 kilometres (50 miles). |
| Thermosphere | The region of the atmosphere between altitudes of roughly 80 kilometres and 460 kilometres. |
| Exosphere | The region of the atmosphere above an altitude of roughly 460 kilometres. |
| Ionosphere | The region of the atmosphere between the altitudes of roughly 65 kilometres and 330 kilometres. |
