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Chapter 7
Section 1 Water in the Air
Clouds
• A cloud is a collection of small water droplets or
ice crystals suspended in the air, which forms
when the warm air is cooled and condensation
occurs when the water droplets stick together
with dust particles in the air.
• Clouds are classified by form or shape, altitude
and precipitation.
Chapter 7
Section 1 Water in the Air
Clouds, continued
•Three main cloud shapes:
•Cumulus Clouds are puffy, white clouds that
tend to have flat bottoms.
• Stratus Clouds are clouds that form in layers.
• Cirrus Clouds are thin, feathery, white clouds
found at high altitudes.
Chapter 7
Section 1 Water in the Air
Clouds, continued
Chapter 7
Section 1 Water in the Air
High Clouds
-High cloud
-Blown by high winds into
long, thin wispy streamers
Made of ice crystals
-White
-Fair weather, but weather is about to
change
Chapter 7
Section 1 Water in the Air
High Clouds
- Sheet like, thin, covers sky
- Made of ice crystals
-White
-Appears before rain or snow
storm
-Signals that a warm front is
approaching
-Formed when a large layer
of air is lifted
Chapter 7
Section 1 Water in the Air
High Clouds
-Small rounded puffs in long
rows
-Made of ice crystals
-White or gray
-Brings fair but cold weather
-Signals that a cold front is
approaching
Chapter 7
Section 1 Water in the Air
Middle Clouds
-Covers whole sky
-Made of ice crystals or water
droplets
-Gray/blue gray sky
-Brings storms with
continuous rain or snow
Chapter 7
Section 1 Water in the Air
Middle Clouds
-Form in groups or parallel
bands
-Made of ice crystals or water
droplets
-grayish white, thick
-Brings thunderstorms
-Formed by convection
-Cold front is approaching
Chapter 7
Section 1 Water in the Air
Low Clouds
-Blankets whole sky
-Made of water droplets
-Light gray
-Light mist or drizzling rain or
snow
-Fog is an example, but forms
at the ground
-can be formed from the lifting
of a thick fog
Chapter 7
Section 1 Water in the Air
Low Clouds
-Low, lumpy in rows or spread
out with clear sky between
them
-Made of water droplets
-Gray
-Fair weather or a light drizzle
Chapter 7
Section 1 Water in the Air
Low Clouds
-Blankets sky, ragged base
-Made with water droplets
-Dark gray
-Steady rain or snow
Chapter 7
Section 1 Water in the Air
Vertical Clouds
-Puffy, like cotton, with flat
base
-Made with water droplets or
ice crystals
-White means fair weather
-Darker means light to heavy
showers
Chapter 7
Section 1 Water in the Air
Vertical Clouds
-Thick, tall
-Made of water droplets and
ice crystals
-White to gray
-Rain, hail, thunderstorms,
tornadoes
-Referred to as thunderheads