Basic Weather Theory
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8 Terms
Define Sublimation and Deposition
Sublimation: solid transfers directly into gas, skipping the liquid stage
Deposition: gas skips the liquid stage and turns into solid
Define evaporation and condensation
evaporation - liquid to gas
condensation - gas to liquid
What is dewpoint?
Dewpoint is the temperature to which air must be cooled to become saturated by the water vapor already present in the air. Achieves 100% relative humidity.
One weather phenomenon which will always occur when flying across a front is a change in the?
wind direction
NOT: stability in the air mass or types of precipitation
What measurement can be used to determine the stability of the atmosphere?
Actual lapse rate - The difference between the existing lapse rate of a given mass of air and the adiabatic rates of cooling in upward-moving air determines if the air is stable.
Steady precipitation preceding a front is an indication of
stratiform clouds with little or no turbulence - is usually steady and there is little or no turbulence
How to read density altitude chart
on the chart find the current altimeter setting and read the conversion factor
subtract or add based the conversion factor to the elevation
follow the “invisible” line for the corrected elevation and temperature
where these two points intercept is your density altitude
understanding chart supplement
