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4D ch 1
4D ch 1 Vocabulary
Term | Definition |
---|---|
humidity | the amount of water vapor in the air |
air pressure | particles of air pressing down on Earth’s surface |
air mass | a huge body of air which all has similar temperature and moisture |
front | the border where two air masses meet |
atmosphere | the layer of air that surrounds our planet |
greenhouse effect | the warming of Earth caused by the atmosphere trapping thermal energy from the sun |
stratosphere | the layer of atmosphere that contains ozone and is located above the troposphere |
barometer | an instrument that measures air pressure |
troposphere | the layer of atmosphere closest to Earth |
anemometer | an instrument used to measure wind speed |