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Science
Describing Weather
Variable | Definition | Measured by |
---|---|---|
air pressure | the force that a column of air applies on the air or a surface below it | barometer |
wind | the movement of air from areas of high pressure to areas of low pressure | anemometer |
humidity | the amount of water vapor in the air | grams of water per cubic of air (g/m3) |
relative humidity | the amount of water vapor present in the air compared | percentages |
precipitation | water, in liquid or solid form that falls from the atmosphere | |
clouds | condensed water droplets or ice crystals suspended in the atmosphere | |
fog | a suspension of water droplets and ice crystals close to or on Earth's surface | |
air temperature | the measure of the average kinetic energy of molecules in the air | thermometer |