| Term | Definition |
|---|
| atmosphere | layer of air around earth that supports and protects life |
| Gases in Atmosphere | Nitrogen, Oxygen, Argon, Carbon Dioxide and others |
| Density | amount of mass in a given volume |
| air density | decreases with altitude |
| natural cycles | nitrogen, carbon dioxide and water |
| carbon cycle | plants take in CO2 and release oxygen |
| nitrogen cycle | bacteria in soil convert the N2 gas into solid forms to be used by living things who in turn put it back into the air. |
| water cycle | evaporation (transpiration from plants), condensattion and percipitation |
| radiation | sun's energy in the form of waves (absorbed or reflected) |
| conduction | the transfer of energy form one substance to another through direct contact |
| convection | transfer of energy from one place to another by the circular motion of heated gas or liquid |
| ultraviolet radiation | has more energy per wave than visible light |
| infrared radiation | has less energy per wave than visible light |
| troposhere | layer closest to earth that is warmed by the ground, where weather ocurrs |
| stratosphere | a clear, dry layer that contains the ozone layer |
| ozone | molecules of gas (o3) that absorb UVA and UVB rays |
| mesosphere | the air is extremely thin, where meteors burn up |
| thermosphere | outermost and hottest layer |
| greenhouse effect | process that keeps ther earth warm by absorbing and emitting infrared gases in the air |
| greenhouse gases | carbon dioxide, methane, nitrous oxide, and water vapor |
| air pollution | smoke and other harmful materials added to the air |
| particulates | tiny particles or droplets that are mixed inwith air |
| fossil fuels | fuels from the remains of prehistoric plants and animals (oil, coal and gasoline) |
| smog | combination of smoke and fog |
| global warming | the amounts of greenhouse gases have been increasing and global temperatures are rising |
Combine with other sets
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