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Earth Science Ch 10
Atmospheric Water
Term | Definition |
---|---|
evaporation | Liquid changes into a gas |
Condensation | A gas changes into a liquid |
Vaporization | Liquid changes to a vapor |
boils | Rapid vaporization of a liquid at its boiling point |
freezes | Liquid changes to solid |
melts | Solid turns into liquid |
sublimation | Solid changes directly into a gas, or vice versa |
Dew point | The temperature at which the relative humidity is 100% |
cloud | A mass of water droplets or ice crystals suspended in air |
Adiabatic cooling | Cooling of an air mass (without a change in the air mass’s overall thermal energy) by a reduction in atmospheric pressure and/or an increase in volume |
Condensation nuclei | Microscopic particles of material, such as salt or smoke, around which the tiny water droplets form |
Freezing nuclei | Small particles of clay or dust shaped like ice crystals |
Supercooled water | Cloud droplets that remain liquid even with very cold temperatures |
fog | The stratus cloud is so low that it touches the ground |
drizzle | Small droplets of rain falling slowly |
Mares’ tails | Cirrus clouds that are arranged in wispy streaks or bands across the sky |
Mackerel sky | Cirro- and altocumulus clouds that form in patterns that resemble the striped markings on the sides of a mackerel |
Dew | Water that condenses on a cool surface when air in contact with the surface cools to below its dew point. |
frost | The Ice crystals that sublimate on a cold surface when the film of air in contacts with the surface is cooled to a dew point below freezing. |
coalescence | Smaller pieces joining together to form a single larger mass. |
Convection | The process by which energy is carried from one place to another due to differences of density in matter. (ex |
orographic | The lifting of an air mass and resulting precipitation as it flows over a mountain. |
front | The boundary surface between two dissimilar air masses. |
Frontal wedging | Vertical Movement of a warm air mass due to a wedge of cold air moving in under it. |
Convergence | The collision of two or more air masses or winds at a single location. |
Freezing rain | Supercooled water that falls as rain and then freezes on the surface it contacts. |
snow | Frozen precipitation formed by the sublimation of water vapor onto freezing nuclei. |
sleet | Small frozen or partially frozen raindrops that form when rain falls through a layer of cold air. |
hail | Precipitation in the form of spheres or irregular lumps of ice. |