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Weather part 1 vocab
| Term | Definition |
|---|---|
| Air pressure | The measure of the force with which air molecules push on a surface. |
| Altitude | Elevation (height) above sea level. |
| Troposphere | Lowest layer of Earth's atmosphere; 0:17 km above Earth's surface,site of weather, organisms,contains most atmospheric. |
| Stratosphere | 2nd layer of atmosphere ; extends from 10 to 30 miles up; location of ozone layer; absorbs 95% of Ultraviolet radiation; temperature with altitude increase. |
| Mesosphere | Middle layer of the atmosphere ; 51-85 km; coldest layer; this is where meteors burn up. |
| Thermosphere | The fourth layer of the atmosphere, in which temperature increases as altitude increases. |
| Exosphere | The outer layer of the atmosphere, extending outward into space. |
| Atmospheric Gasses | Nitrogen makes up 78%, 21% oxygen, and remaining 1% is carbon dioxide, water vapor and other gasses. |
| Nitrogen(N2) | Most abundant gas in the atmosphere (78%) |
| Oxygen (O2) | Gas that makes up 21% of the air in Earth's atmosphere. It passes into the bloodstream at the lungs and travels to all body cells. |
| Carbon dioxide(CO2) | A greenhouse gas: a gas that absorbs and radiates heat. |
| Trace gasses | Gasses such as hydrogen, helium, carbon dioxide, and argon that exits in very small quantities in the atmosphere; gasses that make up less than 1% of Earth's atmosphere |
| Water vapor | Water in form of a gas. |
| Fossil fuels | A natural substance formed from the buried remains of ancient organisms that can be used as a source of energy. |
| Greenhouse gasses | Gasses in the Earth's atmosphere that trap heat near the surface |
| Water cycle | The continuous process by which water moves from the Earth's surface to the atmosphere and back. |
| Evaporation | The change of a substance from a liquid to a gas |
| Condensation | The change from a gas to a liquid |
| Precipitation | any form of water that falls from clouds and reaches Earth's surface(rain or snow or hail or sleet or mist) |
| Transpiration | Evaporation of water from the leaves of a plant |
| Crystallization | The process by which a substance becomes a solid, sort of like freezing |
| Surface runoff | Water that flows over land until it reaches lakes, rivers, or other areas |
| Groundwater Flow | Water that is flowing beneath Earth's surface |
| Dew | Water that has condensed on a cool surface overnight from water vapor in the air |
| Frost | Ice formed when water vapor changes directly into ice crystals |
| Ozone(O3) | Part of Earth's upper atmosphere; it protects people by absorbing harmful rays from the sun. |
| Greenhouse effect | A warming of Earth's surface and the air above it. It is caused by gasses in the air that trap energy from the Sun |
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