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Chapter 10, Lesson
5Clouds
and Precipitati
on
stratus cloudscirrus clouds
cumulus clouds
nimbus cloudsalto clouds
foghail sleet
nucleusovercast
clearscattered
clouds
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stratus – Stratus clouds form in blanket-like layers. They hang low in the troposphere most of
the time.
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cirrus – Cirrus clouds form at high altitudes and are made of
ice crystals. They are thin-looking, wispy clouds.
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cumulus – puffy clouds. They appear flat at the bottom and they are in the middle of the
troposphere.
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nimbus – if rain or snow falls from a cloud, you add “nimbo” or “nimbus” to a cloud’s name.
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alto – “alto” means middle-level clouds. If you see “alto” in a
cloud’s name, you’ll find it in the middle of the troposphere.
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fog – a cloud at ground level.
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hail – pellets or lumps of ice. Usually hail falls when it’s warm
outside. If you hear hail, a tornado might be nearby.
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How is hail formed?
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sleet – precipitation that freezes as it falls though air that is below
freezing in temperature.
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How is sleet formed?First, let’s talk about snow!
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How is sleet formed?Next, let’s talk about freezing rain!
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NOW! How is sleet formed?
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nucleus – the nucleus of a precipitation droplet is usually
dust in the atmosphere. Nucleus means “center.”
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overcast – the skies are completely covered with clouds.
Weather station model for overcast
skies.
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clear – the skies are clear of clouds
Weather station model
for clear skies.
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scattered clouds – clouds are scattered throughout the sky
Weather station model for scattered
clouds
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partly cloudy – the sky is about half clouds and half
clear
Weather station model
for partly cloudy
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mostly cloudy – it’s almost overcast; very little blue sky is
showing
Weather station model
for mostly