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TRANSCRIPT
What do all of these words have in common?
Rain Hail Snow
Cumulus
Stratus
Fog
Glaze
Warm Up
§ What direction does weather move in the USA?
§ Why do hurricanes require warmer environments?
§ Do high pressure systems contain warm or cold air?
Clouds and Precipitation
1. How are clouds formed? Air rises, cools,
and reaches dew point.
Video: How Clouds Form
Clouds Clouds are classified on the basis of their form and height.
2. What are the three main clouds? § Cirrus § Cumulus § Stratus
3. What is fog?
§ A cloud with its base at or very near the ground.
4. Fog formation § Thin, cool (dense) air
remains in low areas
5. How Does Precipitation Form?
Cloud droplets must grow in volume by roughly one million times.
Forms of Precipitation § Rain: drops of water that
are 0.5 mm in diameter. § Snow: light, fluffy, six-
sided ice crystals
Forms of Precipitation
Sleet: fall of small particles of clear to translucent ice
Glaze: when raindrops become supercooled and turn to ice mid air.
§ Hail: irregular lumps of ice from cumulonimbus clouds.
Homework
§ Record the weather and clouds tonight!
Exit Ticket
§ 1) How are clouds classified? § 2) List and describe the three main types of
clouds. § 3) How is fog formed?