What is a cloud? How do clouds form? How are clouds named?

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Presentation transcript:

What is a cloud? How do clouds form? How are clouds named? What is a cumulus cloud? What is a stratus cloud? What is a cirrus cloud? What is cloud seeding?

Do Now 1/16/13 What process forms clouds? Which layer of the atmosphere contains the ozone layer? What is the temperature at which condensation forms on the ground? Most evaporation comes from what?

1) What is a cloud? Collection of millions of tiny water droplets or ice crystals

2) How do clouds form? Condensation - water evaporates then water vapor in the air cools on dust or dirt and becomes liquid water or ice

3) How are clouds named? Height : Cirro – High Alto – Middle Shape: Cirrus – curly/stringy Stratus – layered Cumulus – lumpy/piled Precipitation -add Nimbo or Nimbus

4) What are Cumulus Clouds? Puffy and white Flat bottoms Form when warm air rises Indicate fair weather When these clouds get larger they produce thunderstorms and are called cumulonimbus.

5) What are Stratus Clouds? Form in layers Cover large areas of the sky Often block the sun Formed by a gentle lifting of a large body of air into the atmosphere. Fog is an example of a stratus cloud

6) What are Cirrus Clouds? Thin, feathery white clouds Found in high altitudes Form when the wind is strong May indicate approaching bad weather if they thicken and lower in altitude

Cloud Heights Cloud Types High (above 20,000 feet) Cirrocumulus Cirrostratus Cirrus Cumulonimbus Middle (6,000 – 20,000 feet) Altocumulus Altostratus Low (below 6,000 feet) Stratocumulus Stratus Cumulus Nimbostratus

7) What is Cloud Seeding? Process of spreading either dry ice or aerosols, into the upper part of clouds to form rain