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8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 1/19
Air masses, fronts and
types of clouds• Science
• Indicator II
• Boston International School• Second Term
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8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 2/19
AIR MASSES FRONTSAIR MASSES FRONTSAND TYPES OFAND TYPES OF
CLOUDSCLOUDS
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8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 3/19
Learning objectie• !nderstand ho" the air masses, the
temperature and landforms
determine the "ater cycle toestablish ho" it is affected throughtools to measure the "eather
conditions#
$
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 4/19
Biblical principle• %cclesiastes 1&'
The "ind blo"s to the south
and turns to the north(round and round it goes,
eer returning on its course#
)
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 5/19
An air mass is a large body of air.
Air mass temperature and moisture are consistent.
• Warm air forms over tropical regions near the equator.
• Cold air forms over polar regions.
• Wet air masses form over water
• Dry air masses from over land.
*
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 6/19
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8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 7/19
• A front is a boundary between airmasses.
• There are 2 main types of fronts:1. Cold front
2. Warm front
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8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 8/19
COLD !O"T
• Cold air mass meets a warm air mass andpushes the warm air mass out of its way.
• Bring thunderstorms rain or snow.
• !ost tornadoes develop from• thunderstorms on the edge of a "old front.
• Cold front followed by "ooler drier air.
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 9/19
WA!# !O"T
• Warm air mass meets a "old air mass
and pushes the "old air mass out of the
way.
• Brings dri##ly pre"ipitation.
• $ollowed by "lear warm weather.
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8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 10/19
Cold $ront Warm $ront and
%""luded $ront Animation
• http&''www."lass#one."om'boo(s'earth)s"ien"e'ter"'"ontent'visuali#ations'es2**2'es2**2page*1."fm+"hapter)no,visuali#ation
1.
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 11/19
CloudsClouds
There are $ main types of clouds:
• Cumulus
• %tratus
• Cirrus
Cumulus Cirrus%tratus
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 12/19
CirrusCirrus
They ususally indicate cool,fair "eather#
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 13/19
%tratus Clouds%tratus Clouds
Low clouds that can produce mist or
dri&&le. 'owe(er) when temperatures
are cold enough) these clouds may
also contain ice particles and snow.
•-hey often o""ur along warmfronts.
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 14/19
%tratus Clouds%tratus Clouds
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 15/19
Cumulus CloudsCumulus Clouds
• They are puffy in appearance. Theyloo* li*e large cotton balls.
• 'armless fair weather cumulus
clouds can later de(elop intotowering cumulonimbus clouds
associated with powerful
thunderstorms.
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 16/19
CumulusCumulus
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 17/19
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 18/19
8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]
http://slidepdf.com/reader/full/step-4-social-studies-airmassesandfronts-recuperado 19/19
/lass Actiity• 1# 0hat are barometers andanemometers page $-3
• %4ercise 2, $, and ) on the pages 'and '-# 5eading Support and6ome"or73
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