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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 |
| Mesosphere | Middle layers of atmosphere: 51-81 km; coldest layer ; this is where meteors burn up |
| Troposphere | Lowest layer of Earth's atmosphere; 0-17 km above Earth's surface' site of weather, organisms, contains most atmospheric water |
| Stratosphere | 2nd layer of atmosphere; extents from 10 to 30 miles up; location of ozone layers ; absorbs 95% of Ultraviolet radiation; temperature increases as altitude increases |
| Theremosphere | The fourth layer of the atmosphere, in which temperature increases as altitude increases |
| Exosphere | The outer layer of the Theremsphere, extending outward into space |
| Atmospheric Gases | Nitrogen makes up 78%, 21% oxygen, and remaining 1% is carbon dioxide, water vapor and other gasses |
| Oxygen | Gas that makes up 21% of the Earth"s atmosphere. It passes into the bloodstream at the lungs and travels to all body cells |
| Nitrogen | Most abundant gas in the atmosphere (78%) |
| Carbon Dioxide | A greenhouse gas: a gas that absorbs and radiates heat |
| Trace Gasses | Gasses such as hydrogen, helium, carbon dioxide, and argon that exist in very small quantities in the atmosphere; less than one 1% of Earth's atmosphere |
| Water Vapor | Water in the form of gas |
| Fossil Fuel | A natural substance formed the buried remains of ancient organisms that can be used as a source of e |
| Greenhouse gases | Gasses in Earth's atmosphere that trap in heat near the surface |
| Water Cycle | The continuous process by which water moves from 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 leafs of plants |
| 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. |
| Ground Water 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 | 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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