click below
click below
Normal Size Small Size show me how
The Atmosphere
Chapter 1
| Term | Definition |
|---|---|
| electromagnetic waves | A form of energy that can travel through space. |
| radiation | The direct transfer of energy by electromagnetic waves |
| infared radiation | A form of energy with wavelenghs that are longer than visible light. |
| ultraviolet radiation | A form of energy with wavelengths that are shorter than visible light. |
| scattering | Reflection of light in all directions. |
| greenhouse effect | The process by which heat is trapped in the atmosphere by water vapor, carbon dioxide, methane,and other gasses that form a "blanket" around earth. |
| thermal energy | The energy of motion in the molecules of a substance |
| temperature | The average amount of energy of motion in the molecules of a substance. |
| thermometer | An instrument used to measure temperature, consisting of a thin, glass with a bulb on one end that contains a liquid (usually mercury or alcohol) |
| heat | The energy transferred from a hotter object to a cooler one. |
| conduction | The direct transfer of heat from one substance to another substance that it is touching. |
| convection | The transfer of heat by the movement of a fluid. |
| wind | The horizantal movement of air from an area of high pressure to an area of low pressure. |
| anemometer | An interment used to measure wind speed. |
| wind-chill factor | Increased cooling caused by the wind. |
| local winds | Winds that bow over short distances. |
| sea breeze | The flow of air from an ocean or lake to the land. |
| monsoons | Sea and land breezes over a large region that change direction with the seasons. |
| global winds | Winds that blow steadily from specific directions over long distances. |
| Coriolis effect | The way Earth's rotation makes winds in the northern hemisphere curve to the right and winds in the southern hemisphere turn to the left. |
| latitude | The distance from the equator, measured in degrees. |
| jet streams | Bands of high speed winds about ten kilometers above Earth's surface. |
| evaporation | The process by which water molecules in liquid water escape into the air as water vapor. |
| condensation | The process by which water vapor in the air becomes liquid water. |
| dew point | The temperature at which condensation begins. |
| cumulus | Clouds that form less than two kilometers above the ground and look like fluffy, rounded, piles of cotton. |
| stratus | Clouds that form in flat layers. |
| cirrus | Wispy, feathery clouds made mostly of ice crystals that form at high levels, above about six kilometers |
| precipitation | Any form of water of water that falls from clouds and reaches the Earth's surface. |
| rain | Drops of water are called rain if they are at least 0.5 mm in diameter. |
| sleet | Ice particles smaller than 5mm in diameter. |
| freezing rain | Rain drops that freeze once they reach a cold surface. |
| hail | Round pellets of ice that are at least 5 mm in diameter. |
| snow | Water vapor in clouds are converted directly into ice crystals. |
| droughts | Long periods of unusually low precipitation. |