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30 Cards in this Set

  • Front
  • Back
describing a change in temperature resulting from the expansion or compression of air.
Advection fog
condensation of water vapor that results from the cooling of warm, moist air as it moves across a cold surface.
Advective cooling
decrease in the temperature of a mass of air that results as it moves over a cool surface.
Cirrus Cloud
feathery cloud composed of ice crystals that has the highest altitude of any cloud in the sky.
Cloud seeding
addition of freezing nuclei to supercooled clouds in an attempt to induce or increase precipitation.
combination of different sized cloud droplets to form larger droplets.
Condensation nuclei
solid particles in the atmosphere, such as ice and dust, that provide the surfaces on which water vapor condenses.
Convective Cooling
decrease in temperature of a mass of air that results as the air rises and expands
Cumulus Cloud
thick, billowy clud that forms above stratus clouds and below cirrus clouds.
type of consation formed when air that is in contact with a cool surface loses heat until it reaches saturation.
Dew Point
temperature to which air must be cooled to be saturated.
Freezing nuclei
condensation nuclei with a crystalline structure like that of ice.
ice crystals formed when the dew point is below 0°C and water vapor directly enters the solid state.
Glaze Ice
thick layer of sheet ice formed when rain freezes as it contacts a surface.
type of precipitation in the form of lumps of ice.
Hair hygrometer
instrument used to measure relative humidity, based on the fact that human hair stretches as humidity increases.
amount of water vapor in the atmosphere.
Latent heat
energy stored in molecules.
instrument used to measure relative humidity.
Radiation fog
condensation of water vapor that results from the cooling of air that is in contact with the ground.
Rain gauge
instrument used to measure the amount of rainfall.
Relative Humidity
ratio of the amount of water vapor to the amount of water vapor the air can hold when saturated.
describing air that contains all that of the water vapor that it can hold at a specific temperature.
ice pellets that form when rain falls through a layer of freezing air.
Specific Humidity
actual amount of moisture in the air.
Steam Fog
condensation of water vapor that results when cool air moves over warm water.
Stratus Cloud
cloud with a sheetlike or layered from that is the lowest cloud in the sky.
process in which a solid turns directly into a vapor.
process in which water droplets are induced to remain liquid at temperatures below 0°C.
Upslope Fog
condensation of water vapor that results form the lifting and adiabatic cooling air rising up a slope of land.