| A | B |
|---|
| weather | condition of Earth's atmosphere at a particular time and place |
| atmosphere | thin layer of gases that form Earth's outer most layer |
| density | measure of how much mass of a substance is contained in a given volume |
| air pressure | weight of a column of air pushing down on an area |
| aneriod barometer | instrument that measures changes in air pressure without liquid |
| mercury barometer | instrument that measures changes in air pressure; consists of open dish and glass tube |
| altitude | elevation above sea level |
| troposphere | atmospheric layer where all weather occurs |
| stratosphere | atmospheric layer that has the ozone layer |
| mesosphere | atmospheric layer that protects against most meteoriods |
| thermosphere | outermost layer of Earth's atmosphere |
| ionosphere | atmospheric layer where the aurora borealis occurs |
| exosphere | atmospheric layer where satellites are found |
| sea breeze | flow of cooler air from over an ocean or lake toward land |
| ultraviolet radiation | electromagnetic waves with wavelengths that are shorter than visible light but longer than X-rays |
| infrared radiation | electromagnetic waves with wavelengths that are longer than visible light but shorter than microwaves |
| scattering | reflection of light in all directions |
| greenhouse effect | trapping of heat near a planet's surface by certain gases in the planet's atmosphere |
| thermal energy | total kinetic and potential energy of all particles of an object |
| anemometer | instrument used to measure wind spped |
