Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

ch 18


any form of water that falls from a cloud

Latent Heat

heat absorbed or given off during a change of phase at a constant temperature


the process of changing a liquid to gas


when water vapor changes to liquid


conversion of a solid to a gas without passing through the liquid state


the conversion of a vapor directly to a solid


the general term for the amount of water vapor in the air


being the most concentrated solution possible at a given temperature

Relative Humidity

a ratio of the airs actual water-vapor air can hold at the temperature and pressure

Dew Point

the temperature to which a parcel of air would need to be cooled to reach saturation


measures humidity

Dry Adiabatic Rate

10C for every 1000m or 5.5F for every 1000ft (Temp. change for unsaturated air parcels)

Wet Adiabatic Rate

the slower rate of cooling caused by the addition of latent heat released

Orographic Lifting

cloud formation that occurs when warm moist air is forced to rise up the side of a mountain


produces when warm air and cool air collide

Temperature Inversion

when ai increases with height

Condensation Nuclei

Microscopic particles on which water vapor condenses to form cloud droplets.

Cirrus Clouds

high, white, and thin clouds

Cumulus Clouds

clouds that consist of rounded individual cloud masses


sheets of clouds that cover most of the sky

Bergeron Processs

Ice crystals grow at the expense of water droplets


water in a liquid state below 32 degrees celcius


solution has more solute than it normally can hold at that temperature

Collision-Coalescence Process

mechanism that forms raindrops

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording