1. 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?

2. 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?

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

4. 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

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

6. 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.

7. 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

8. 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

9. 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

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