Clouds
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Transcript of Clouds
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Clouds
6TH GRADE SCIENCE
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Clouds• Water from the earth’s surface moves into the air
by EVAPORATION and becomes WATER VAPOR.
• Clouds are formed when rising air is cooled and the water vapor condenses on particles in the air and forms tiny water droplets.
• The temperature at which condensation occurs is called dew point.
• Sunlight reflected on the water droplets allow us to see the clouds
• What is in the clouds:1. Salt: ocean water2. Dust: rock particles, meteor dust3. Smoke: burning fossil fuels, volcanic activity4. Pollution Brainpop: clouds
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How Clouds Form• Clouds form when warm, moist air rises and
cools. Water vapor condenses on tiny particles to form liquid water or ice crystals.
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How Air Rises• Sunshine – heat from the sun or warm ground
warms the air and makes it lighter.
• The terrain – air may rise as it is forced upwards due to changes in the terrain (landscape).
• A front – air can also rise at a weather front. At cold fronts, cold air is pushed under warm air, forcing it upwards and at a warm front, warm moist air is forced up and over the cold air.
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Thunderstorm Formation1. Moisture - to form clouds and rain. 2. Unstable Air - relatively warm air that can rise
rapidly. 3. Lift - fronts, sea breezes and mountains are
capable of lifting air to help form thunderstorms.
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Water Droplets• Droplets come in many sizes. A raindrop has
about one million times as much water in it as a cloud droplet.
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Clouds are classified by shape and by altitude (how high they are)
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• Clouds are formed by the condensation of water in the atmosphere.
• Certain types of clouds are associated with specific weather conditions.
• Air movement causes clouds to take different shapes, forms, and designs.
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Cloud Types• The speed and direction of
movement of clouds are determined by the wind.
• Large fluffy clouds are formed when air moves vertically.
• Layered cloud shapes are formed when air moves horizontally.
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Notes• Title your notebook page CLOUDS.• Enter the page into your Table of
Contents.• On a piece of notebook paper copy
down anything that is in purple.• Also copy the cloud symbol• You will use these notes for an
assignment so pay attention!!
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Cumulus (vertical forming)• Cumulo (means
"heap“ or “pile”) refers to piled-up clouds.
• Fair-weather clouds• Common on sunny
days
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Cumulonimbus (thunderhead)vertically forming
• Nimbo (means "rain") indicates that the cloud can produce precipitation (rain, snow, or other forms of falling water).
• Cumulo (means "heap“ or “pile”) refers to piled-up clouds.
• Dark storm clouds, produce rain
• Anvil, column- shaped• Associated with
thunderstorms
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Stratus (low)• Strato (meaning "layer“ or
“spread out”) refers to flat, wide, layered clouds.
• Smooth layers of low clouds.• They are the light grey
clouds that give winter skies a dull grey color.
• Usually associated with moist weather- drizzle, rain, snow, or small ice particles
• Low, flat, & grey• Called fog when it touches
the ground
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FOGA stratus cloud in contact
with the ground.
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Nimbostratus (low)• Nimbo (means "rain")
indicates that the cloud can produce precipitation (rain, snow, or other forms of falling water).
• Strato (meaning "layer“ or “spread out”) refers to flat, wide, layered clouds.
• Smooth layers of dark, grey clouds
• Usually bring steady continuous rain or snow.
• These clouds are thick enough to blot out the sunlight.
• They are shapeless with irregular edges.
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Stratocumulus (low)• Strato (meaning
"layer“ or “spread out”) refers to flat, wide, layered clouds.
• Cumulo (means "heap“ or “pile”) refers to piled-up clouds.
• Piles of clouds in layers
• Associated with a chance of drizzle or snow.
• Sheets of low, lumpy, and grey clouds
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Altocumulus (middle)• Alto (means "high") is
a prefix given to mid-altitude clouds (between 6,000 and 20,000 feet).
• Cumulo (means "heap“ or “pile”) refers to piled-up clouds.
• Piles of clouds in waves• Mid-level fluffy• Usually associated with
rain or snow.
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Altostratus (middle)• Alto (means "high") is
a prefix given to mid-altitude clouds (between 6,000 and 20,000 feet).
• Strato (meaning "layer“ or “spread out”) refers to flat, wide, layered clouds.
• Thick sheets of grey or blue clouds
• Usually associated with rain or snow.
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Cirrus (high)• Cirro (means "wisp or
curl of hair") is a prefix given to high-altitude clouds (above 20,000 feet).
• High-level, wispy• Feather-like clouds
made of ice crystals • Formed by ice crystals
which give the cloud a thin, wispy, or feathery appearance
• Usually associated with fair weather
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Cirrocumulus (high)• Cirro (means "wisp or
curl of hair") is a prefix given to high-altitude clouds (above 20,000 feet).
• Cumulo (means "heap“ or “pile”) refers to piled-up clouds.
• Cottony clouds in waves
• Usually associated with fair weather
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Cirrostratus (high)• Cirro (means "wisp or curl
of hair") is a prefix given to high-altitude clouds (above 20,000 feet).
• Strato (meaning "layer“ or “spread out”) refers to flat, wide, layered clouds.
• Sheet-like, high-level layers of ice crystals
• Thin sheets of clouds.• Sometimes looks like a
halo around the sun or moon.
• Usually associated with rain or snow within 24 hours.
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Cold FrontCold Front: The zone where cold air is replacing warmer air
Creates tall thunderstorm clouds
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Warm FrontWarm Front: The zone where warm air is replacing colder air
Creates many types of clouds
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Stationary Front
Stationary Front: When either a cold or warm front stops moving
Creates thin clouds the cover a lot of sky
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Cloud Notes• Strato (meaning "layer“ or “spread
out”)• Nimbo (means "rain")• Cumulo (means "heap“ or “pile”)• Alto (means "high")• Cirro (means "wisp or curl of hair")
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Making Your Cloud Diagram
You will need 1 sheet of 8 ½” x 11” of paper and a pencil
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Fold your paper into 3 sections
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thunderhead
Fair weatherFluffy &
puffy
Feathery crystals
Flat & gray rainthunderhead
Cirrus Cirrocumulus Cirrostratus
altocumulus Altostratus
Stratocumulus
Stratus Nimbostratus
Cumulonimbus
Cumulus
HIG
H
CLO
UD
SM
EDIU
M
CLO
UD
SLO
W C
LOU
DS
VERT
ICAL
LY F
ORM
ING
CL
OU
DS
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