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PrecipitationAir Masses
Clouds InstrumentsMiscellaneous
Water in the air condenses when the air is cooled to the point of
this
What is saturation?
What water vapor in the air eventually falls
to the Earth as
What is precipitation?
What cloud droplets that fall in
temperatures above freezing fall as
What is rain?
What forms instead of rain when the air
temperature is below freezing
What is snow?
Snowflakes that melt as they fall then
refreeze form this
What is sleet?
The properties of this are determined by the
part of the Earth’s surface over which it
forms
What is an air mass?
The slope of a warm air mass
What is gentle?
The kind of front that forms when a warm air mass is forced up over a cold air mass
What is warm?
The kind of air mass that develops over Northern Canada
What is cold and dry?
The kind of front that forms when two cold air masses merge and
the warm air mass between them is forced
to rise
What is occluded?
A large and billowy cloud
What is cumulus?
When water does this in the atmosphere, it
forms clouds
What is condenses?
When air near the ground is cooled to the saturation point, this
forms
What is fog?
Water that condenses around dust particles
in the atmosphere forms these
What are cloud droplets?
The type of clouds that form near the ground
What is stratus?
An instrument used to measure temperature
What is a thermometer?
Sensitive instruments used to measure
atmospheric pressure
What are barometers?
The measure of the amount of water at a
particular temperature
What is the relative humidity?
An instrument which measures relative
humidity
What is a psychrometer?
The kind of weather that high pressure
usually brings
What is clear?
The amount of water vapor in the air
What is humidity?
How a great deal of water gets into the
atmosphere
What is evaporates?
The temperature at which air is saturated
and condensation takes place
What is dew point?
The boundary between air masses
What is a front?
The kind of front that forms when a cold air
mass moves underneath a warm air
mass
What is cold?