clouds brainpop. what is a cloud? it is a collection of millions of tiny water droplets or ice...
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What is a cloud?
• It is a collection of millions of tiny water droplets or ice crystals.
• As water vapor rises and cools, it becomes saturated (full).
• It then condenses onto tiny dust or smoke particles as water droplet or ice. When there are millions of these, a cloud forms
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Types of clouds
• Cumulus – fluffy
• Stratus – cover
• Cirrus - feathery
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Cloud questions• Why are clouds white?
– Clouds are white because they reflect the light of the sun.
– Clouds reflect all the colors the exact same amount so they look white (visible light).
• Why do clouds turn gray? If the clouds get thick enough or high enough all the light above does not make it through, hence the gray or dark look.
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Cloud questions
• Why do clouds float?– As long as the cloud and the air that it’s
made of is warmer than the outside air around it, it floats!
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Cumulus clouds• Puffy white clouds• Flat bottoms• Usually fair weather clouds• Cumulus: Latin word for a heap or a
pile
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Stratus clouds• Form in layers• Cover large areas• Stratus: Latin word that means "to spread
out."
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Cirrus clouds• Thin and feathery• High altitudes• May indicate bad weather is coming.• Cirrus: Latin word for a tuft or curl
of hair.
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Classification of clouds
• We classify clouds not only by type (cumulus, stratus, cirrus) but also by form and altitude.
• Form (can be prefix or suffix)– Nimbus/Nimbo means that precipitation might
fall from the cloud.
• Altitude (these are all prefixes)– Strato – low clouds– Alto – middle clouds– Cirro – high clouds
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Classifying clouds• You can add the prefix/suffix of form
and altitude to the cloud type to classify the clouds more specifically.
• Examples:– Cumulonimbus – thunderstorm
producing cumulus cloud– Altostratus – a middle level stratus
cloud
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More Examples
–Cirrostratus – a high level stratus cloud
–Stratocumulus – a low level cumulus cloud
–Nimbostratus – light rain producing stratus cloud
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