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The Great Air Race
Twig Science - Volume 2
| Term | Definition |
|---|---|
| air mass | a large horizontal volume of air in the atmosphere that is mostly even in temperature and moisture |
| altitude | the height of an object or point in relation to sea level |
| atmosphere | the layers of gas surrounding a planet |
| atmospheric pressure | the weight of the gases that make up the Earth’s atmosphere |
| barometer | a scientific instrument used to measure air pressure in a certain environment |
| biosphere | the regions of the surface and atmosphere of the Earth in which living organisms can exist |
| cold front | the edge of a cold air mass that is moving forward |
| condensation | the process by which a gas turns into a liquid |
| crosswind | a wind blowing across the path of a traveling object, which makes it difficult to maintain direction |
| density | the amount of particles in a given amount of matter and how closely packed together they are |
| dew point | the temperature at which vapor, such as smoke or fog, begins to condense and form dew |
| energy transfer | the process of energy moving from one energy store to another |
| evaporation | the process by which a liquid turns into a gas |
| front | the boundary formed when two air masses meet, creating some type of weather or weather or precipitation |
| geosphere | the Earth’s rocks and soil |
| gravity | a natural phenomenon by which all things with mass are brought toward one another |
| ground water | the water found underground in the cracks and spaces in soil, sand, and rock |
| hydrosphere | the parts of the Earth made up of liquid water, ice, or water vapor |
| isobar | a line on a weather map to show points that have the same air pressure |
| leeward side | the side of a mountain that faces away from the direction that wind usually comes from - it is drier and less windy |
| ocean current | a pattern of movement of water in the ocean |
| particle | a very tiny piece of matter |
| precipitation | rain, snow, sleet, or hail that falls to or condenses on the ground |
| probability | the likelihood of something occurring |
| rain shadow | the area on the leeward side of a mountain that gets less rain because the mountain has caused it to fall on the windward side |
| relative humidity | a measurement of water vapor in the air, compared to how much there could be |
| surface runoff | excess water, from rain or other sources that flows over the land surface |
| temperature | the measure of how hot or cold a substance or object is |
| topography | the shape and features of an area of land |
| transpiration | the movement of water vapor from a plant into the atmosphere |
| turbulence | a state of unsteady up-and-down movement, caused by irregular air currents |
| variable | something that can be controlled or changes as part of an investigation |
| water cycle | a model describing how water continually cycles among land, ocean, and atmosphere via transpiration, evaporation, condensation, and crystallization, and precipitation, as well as downhill flows on land |
| weather | the state of the atmosphere at a particular time and place - includes factors such as temperature, air pressure, dryness, cloudiness, wind, and rain |
| wind | the natural movement of the air, especially in the form of a current of air blowing from a particular direction |
| windward side | the side of a mountain that faces the direction that wind usually comes from - it is wet and rainy |
| cold front | the edge of a cold air mass that is moving forward |
| crosswind | a wind blowing across the path of a traveling object, which makes it difficult to maintain direction |
Created by:
aplumley
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