Download Factors Affecting Weather Review

Review Day
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Drill: Complete the sentence.
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________ pressure systems are caused
by ________ air rising allowing clouds
to form.
Objective: SWBAT identify key
components of the Weather Factor
in order to prepare for the unit test.
HW: Study
Factors Affecting Weather Review
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Measuring Air Pressure: Barometer
(inches, milibars)
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Mercury: Liquid mercury rises in the cylinder
as air pressure increases.
Anaroid: Solid thin metal walls that expand or
push in based on atmospheric pressure.
Thermometer:
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Temperature: Average amount of
energy of a substance and measured in
Celsius (0 – 100) and Fahrenheit (32 –
212).
Winds: Caused by differences in
pressure. Horizontal movement of air.
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Measuring: Uses an anemometer;
see picture.
Wind chill factor: Removes heat
from skin causing it to feel cooler
than it actually is.
Water in the Atmosphere ; Cloud
formation leads to precipitation.
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Humidity: Amount of water in air.
Relative Humidity: Percent of water
in air compared to amount it holds.
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Psychrometer: measures relative
humidity.
Dew Point: Temperature when water
condenses out of air, clinging to
particles, and forms clouds.
Local Winds: Unequal heating of land
and water, smaller area, changes
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Local Winds can be found near a large body of
water and around mountainous areas.
Sea breezes: Occur during the day time when
warm air rises from the land and is replaced by
cooler air coming from the sea.
Land breezes: Occur at night when cool air
from land blows out to replace warmer air rising
from sea.
Mountain breezes: Winds and air masses are
funneled up the mountain during the day and
directed down the mountain at night when
cooler.
Global Winds: Unequal heating of
globe, larger area, steady.
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Warm air rises near equator and falls
at poles creating wind belts.
Coriolis Effect: Due to rotation of the
Earth winds do not follow a straight
path.
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Northern hemisphere: Turns to right.
Southern hemisphere: Turns to left.
3 major belts:
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Trade winds: Blow from NE to SW
Prevailing Westerlies: Blow from SW to
NE
Polar Easterlies: Blow away from poles,
East to West
Other Areas
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Areas of Inactivity due to rising or
falling air masses.
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Doldrums: Rising air near equator.
Horse Latitudes: Falling air (30 degrees
North).
Types of Clouds: According to height & Type
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Cumulus: Form less than 2 km but can
reach 18km. Fluffy, piles of cotton.
(Fair Skies)
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Stratus: Flat layers, cover the sky.
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Cumulonimbus: Towering clouds that
produce thunderstorms.
Altocumulus: Very high cumulus clouds.
Nimbostratus: Thicken producing rains or
snow.
Cirrus: High altitudes above 6km.
Wispy feathery. Made of ice crystals.
Air Masses according to temp and
humidity
Polar = Cold air from the poles.
 Tropical = Warm air from the
equator.
 Maritime = Moist air forms over
water.
 Continental = Dry air forms over
land.
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