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Air masses, fronts and types of clouds • Science Indicator II Boston International School Second Term 1

Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]

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Page 1: Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]

8/15/2019 Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]

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Air masses, fronts and

types of clouds• Science

• Indicator II

• Boston International School• Second Term

1

Page 2: Step 4 Social Studies AIR_MASSES_AND_FRONTS [Recuperado]

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AIR MASSES FRONTSAIR MASSES FRONTSAND TYPES OFAND TYPES OF

CLOUDSCLOUDS

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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#

$

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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#

)

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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.

 

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•  A front is a boundary between airmasses.

• There are 2 main types of fronts:1. Cold front

2. Warm front

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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.

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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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CloudsClouds

There are $ main types of clouds:

• Cumulus

• %tratus

• Cirrus

Cumulus Cirrus%tratus

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CirrusCirrus

They ususally indicate cool,fair "eather#

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%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.

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%tratus Clouds%tratus Clouds 

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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. 

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CumulusCumulus

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/lass Actiity• 1# 0hat are barometers andanemometers page $-3

• %4ercise 2, $, and ) on the pages 'and '-# 5eading Support and6ome"or73

1-