| Question |
Answer |
| Atmosphere |
The masss 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 |
| Homosphere |
The lower layer of earth's atmosphere, which exists from ground level to roughly 80 kilometers (50 miles) above sea level |
| Heterosphere |
The upper layer of earth's atmosphere, which exists higher than roughly 80 kilometers (50 miles) above sea level |
| Troposphere |
The region of the atmosphere that extends from ground level to roughly 11 kilometers (7 miles) above sea level |
| Stratosphere |
The region of the atmosphere that spans altitudes of roughly 11 kilometers to 48 kilometers (30 miles) |
| Mesophere |
The region of the atmosphere that spans altitudes of roughly 48 kilometers to 80 kilometers (50 miles) |
| Jet streams |
Narrow bands of high speed winds that circle the earth, blowing from west to east |
| Heat |
Energy that is transferred as a consequence of temperature differences |
| Temperature |
A measure of the energy of random motion in a substance's molecules |
| Thermosphere |
The region of atmosphere between altitudes of roughly 80 kilometers and 460 kilometers |
| Exosphere |
The region of the atmosphere above an altitude of roughly 460 kilometers |
| Ionosphere |
The region of the atmosphere between the altitudes of roughly 64 kilometers and 330 kilometers, where the gases are ionized |
Science Vocab 147928
