Air Masses: A large body of
air with the same temperature
and moisture throughout.
Air formed over warm water
is warm and moist.
Air formed over land in
north is cold and dry.
Four different surface conditions that form air
Air over land = Dry
Air over water = Moist
Air near poles = Cold
Air near equator = Warm
High & Low Pressure Systems
High pressure systems bring
clear, skies, dry weather and
gentle winds. COLD AIR
Low pressure systems bring
cloudy, wet weather, with strong
gusty winds. WARM AIR
Fronts: When one air mass
comes in contact with
another, the boundary
between them is called a
front. Often producing
clouds, strong winds, and
TYPES OF FRONTS:
Cold Front : cold air mass pushes
under a warm air mass. Bring
heavy rain, gusty winds, and cooler
Warm Front: warm air mass
pushes under cold air mass. Bring
light rain lasting a few days and
When a warm or cold front stops
moving. These type of conditions can
last for days. Temperatures remain
stagnant and winds are gentle to nil.
Occluded Front: the cold front
over takes the warm front. The
weather is not as extreme
Forecasting An attempt to
predict future weather.
Decrease in air pressure = stormy
weather. While increase in air
pressure = fair weather.
Increase in clouds front is coming.
Weather: Consist of Atmosphere, Temperature,
Humidity, Precipitation, Wind, and Cloud Cover
Atmosphere: Consist of the gas part of earth
Troposphere: Layer of atmosphere that we live in
an most weather takes place in.
Stratosphere: increase in temp. with increase in
altitude red color.
Mesosphere: decrease in temp. with increase in
Thermosphere: Outer most layer of atmosphere
Temperature: Amount of heat in the air
Air Pressure: Measured with barometer, as
temperature increases air pressure decreases
Humidity: is the amount of water vapor in
Wind: Movement of air. Measured with a
Precipitation: any form of water that falls to
earth (rain, sleet, snow, hail)
Climate: Average weather of an area over
a period of time.
Latitude: distance from equator.
Altitude: height above sea level. Cooler
temperatures at higher altitudes then
Latent Heat: Hidden heat. Water has a
high latent heat that is why areas near
large bodies of water have cooler
summers and warmer winters.
Air Masses: A large body of air with the
same temperature and moisture
Continental: Air formed over continents is
Maritime: Air formed over water is wet
Fronts: When one air mass comes in
contact with another air mass
Cold Front: cold air mass pushes under
a warm air mass. Bring heavy rain, gusty
winds, and cooler temperatures.
Warm Front: warm air mass pushes
under cold air mass. Bring light rain
lasting a few days and warmer