water in the atmosphere
How does water move through the atmosphere?
What is the water cycle?
two conditions needed for condensation
what are the cooling of air and the presence of particles in the air?
most common type of precipitation
what is rain
air mass is
what is a huge body of air in the lower atmosphere that has similar humidity and temp and air pressure at any given moment?
if the air is cooler than _________ *c precip fall s as snow
0
three parts of the water cycle
what are precipitation, condensation, and evaporation?
most particles are
what are salt crystals, dust from soil, smoke-ash?
two conditions must be met for clouds to form.
-cool enough for water vapor to condense
-small particles present for the water vapor to condense on
what is a maritime air mass?
an air mass that forms over an ocean
thunderstorms form by
when is warm air forced upward along a cold front
cold or warm air can hold more water
what is warm air?
cirrus clouds
what are wispy feathery clouds made of ice crystals?
How is snow formed?
when water vapor in a cloud is converted directly into an ice crystals
what is a contdental air mass
an air mass that forms over land
a hurrican has winds of _______km/h or higher
also typical-_________km across
-119
-600
humidity
What is a measure of the amount of water vapor in the air?
cumulus clouds
look like cotton balls
-cumulosnimbus clouds produce thunderstorms
what is hail
a round pellet of ice larger then 5mm in diameter
-Extra: forms only in cumulonibus cluds during a thunder storm
what is continental Polar
what is continental Tropical
-CP can bring bitterly cold with low humidity. Storms may occur
-CT hot dry air masses, bring hot and dry weather
tornados suck up debri b/c
there low pressure inside a tornado
Psychrometer
an instrument used to measure Relative Humidity?
stratus clouds
what are clouds that are spread out evenly about the sky
what is freezing rain?
rain drops that fall as liquids water but feeze when they touch a cold suface.
what is maritime polar
what is maritime Tropical
-MP Cold humid air masses cool the air of the land
-MT Warm humid air masses can bring thunderstorms, heavy rain, or snow
hurricanes that are formed over the Atlantic Ocean are steered by
what is the Estery Trade winds ?