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Weather Chapter 1
Term | Definition |
---|---|
atmosphere | a mixture of gases that surrounds a planet, such as Earth |
air pressure | the measure of the force with which air molecules push on a surface |
altitude | the height of an object above the Earth's surface |
troposphere | the owest layer of the atmosphere (means "change") |
stratosphere | the atmospheric layer above the tropsphere (means "layer") |
ozone | a gas molecule that is made up of three oxygen atoms and that absorbs ultraviolet radiation from the sun |
mesosphere | the coldest layer of the atmosphere (means "middle") |
thermosphere | the uppermost layer of he atmosphere (means "heat") |
radiation | the transfer of energy as electromagnetic waves, such as visible light or infrared waves |
conduction | ther transfer of thermal energy from one material to another by direct contact; conduction can also occur within a substance |
convection | the transfer of thermal energy by the circulation or movement of a liquid or gas |
greenhouse effect | the natural heating process of a planet, such as the Earth, by which gases in the atmosphere trap thermal energy |
global warming | a rise in average global termperatures |
wind | moving air |
Coriolis effect | the curving of moving objects from a straight path due to the Earth's rotation |
trade winds | the winds that blow from 30 degrees latitude to the equator |
weterlies | wind belts found in both the Northern and Southern Hemispheres between 30 degrees and 60 degrees latitude |
polar easterlie | wind belts that extend from the poles to 60 degrees latitude in both hemispheres |
jet streams | narrow belts of high-speed winds tht blow in the upper troposphere and the lower stratosphere |
Primary Pollutants | pollutants that are put directly into the air by human or natural activity |
secondary pollutants | pollutants that form from chemical reactions that occur when primary pollutants come in contact with other primary pollutants or with naturally occurring substances, such as water vapor |
acid precipitation | precipitation that contains acids due to air pollution. |