brain pop: clouds
Post on 02-Jan-2016
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Brain Pop:Clouds
Cloud Types
18.3
18.3 Types of Clouds•Clouds are classified based on how they formed and their height•3 basic forms…
• Seen in fair weather, but can mean rain or snow is coming
Cirrus: (= a curl of hair) Thin, white, wispy, feathery
• Made from ice crystals at high altitudes
• Usually mean fair weather
Cumulus: (= a pile) Rounded, thick, puffy masses
• Formed by vertically rising air currents
• Block out sunlight - associated with rain
Stratus: (= a layer) Layered, gray, and smooth
• Form in sheets at low altitudes
• 3 levels of height can have seasonal and latitudinal variation
High Clouds: (above 6000 meters)
Cirrus cirrocumulus
cirrostratusCirrostratus halo around the sun
Middle Clouds: (2000-6000 meters)
altocumulus
altostratus
Low Clouds: (below 2000 meters)
nimbostratus
Stratus stratocumulus
Clouds of vertical development: (start at 2000 meters – mid/high)
cumulonimbus
Fog: A cloud with its base at or very near the ground
• The only difference between clouds and fog is their method and place of formation.
Fogs caused by cooling
Ex: coastal California
• Fog forms when warm oceanic air moves over a cold water current, then wind blows it over land
• OR fog forms over land as air temperature near the ground drops overnight and reaches the dew point in the early morning
• Fog forms over water when water temperatures are still warm, but air temperatures have fallen rapidly
• Fall and early winter
Fogs caused by evaporation
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