1) When air is compressed or expands, it causes changes in temperature - compression warms air while expansion cools it. 2) Mountains cause air to rise and cool, which can lead to cloud formation and precipitation on the windward side, while the air is dry on the leeward side having lost most moisture. 3) When warm and cold air masses meet, they form fronts where the denser cold air acts as a barrier to the rising warm air, which can produce storms along the front.

1. By: Anthony Perno

2.  When air is compressed or allowed to expand
 When air expands it cools, when it compress it
warms
 Dry adiabatic rate is the cooling or getting
warmer in unsatured air

3.  Mountains act as barriers to air flow
 When air goes up a mountain, cooing often
makes clouds and precipitation
 By the time the air reaches the leeward side
most of the moisture is gone

4.  Warm and cold air collide, producing a front
 Cooler, denser air acts as a barrier as the
warmer, less dense air rises
 Weather-producing fronts are associated with
storm systems

5.  When air flows from more than one direction it
flows upward because it can’t go down
 Leads to adiabatic cooling and clod formation
 Air movement and the rise of it is helped by
solar heating of the land

6.  When warm air rise’s above the condensation
level, clouds form
 Air that is warmer and less dense than the air
around the less dense air will move upward
 The process that produces rising thermals is
localized convective lifting

7.  Air that is cooler and more
dense tends to sink to its
original position which is stable
air
 If the air is warmer and less
dense than the surrounding air
it will began to rise, this is
called unstable air
 When stable gets forced into the
Earth’s surface clouds that are
formed widespread and have
little thickness

8.  Happens when water vapor in the air turns
into liquid
 For any of this to happen the air must be
saturated
 Saturation occurs when the air is cooled to its
dew point

9.  Basic form’s of
clouds are cirrus,
cumulus, and stratus
 Cirrus- clouds are
high white and thin
 Cumulus- a pile of
clouds
 Stratus- a layer of
clouds that cover
most of the sky

10.  All high clouds are thin and white
 Not considered precipitation makers
 Sometimes made up of ice crystals because low
temperature and small amount on water vapor
presents at high altitudes

11.  Clouds that are in the middle of the sky
 Altocumulus clouds are composed of rounded
masses
 Altostratus clouds create a uniform white sheet
covering the sky

12.  These clouds are developed in stable air
 Three members in the low cloud family:
stratus, stratocumulus, and nimbostratus
 Sometimes these clouds can produce light
precipitation

13.  All related to one
another and all have
unstable air
 Clouds have their
bases in the low height
range but tends to rise
upward into the
middle
 When clouds move
upward and
acceleration is
powerful clouds with
great vertical range
form

14.  Fog is pretty much a
cloud near or on the
ground’s surface
 Fog can form when
enough water vapor is
added to the air
 When fog is dense
enough its visibility is
a few meters or less,
making it hard to see
when driving

15.  Cloud droplets do not freeze at 0 degrees
 Freezing nuclei can cause supercooled water to
freeze
 Any left over water vapor becomes ice that
lowers the relative humidity near the rest of the
other droplets

16.  Some water-absorbing
particles can remove
water vapor from the air
at relative humidities less
than 100%
 When bigger water
droplets move throw the
air they collide with
smaller ones
 Rainfall an be associated
with clouds located below
the freezing level

17.  Rain means drops of water falling from a cloud
 Snowflakes usually melt before they hit the
ground and turn into rain as they fall
 There are light and fluffy snowflakes and ice
crystals join into larger clumps to make then
harder

18.  Sleet is small particles of clear ice falling from
cloud
 Glaze is freezing rain that when raindrops
becomes super cooled as they fall threw the air
 Hail is made in cumulonimbus clouds

19. THE END!!!!!!!!!!!!!!