The sun is the major force that powers wind. Wind is air moving horizontally, parallel to the surface of the earth. Movement begins as warm air meets cool air. Moving air sets the major wind patterns in motion. Put the scrambled, broken letters in order, and you’ll identify four obstacles that reduce wind speed. 1.Es + or + ts + f _ _ _ _ _ _ _ 2.U + il + ngs + di + b _ _ _ _ _ _ _ _ _ 3.Ls + I + h + l _ _ _ _ _ 4.Ta + mo + ns + I + un _ _ _ _ _ _ _ _ _

1.Which 2 gases is the atmosphere mostly composed of? 2.List the 3 mechanisms of energy transfer as heat. 3.Which wave has the longest wavelength? Gamma or Radio 4.What term is used to describe how much water is in the air? 5.Name one high cloud type that are composed of ice.

Answers 1.Nitrogen and oxygen 2.Convection, conduction, and radiation 3. Radio 4.Humidity 5.Cirrus

Copy and answer question in your notebook. 1. What type of cloud is a symbol of a eminent storm?

Cloud Formation

Clouds form when warm moist air rises, expands and then cools When the air reaches the LCL (lifted condensation level) the air condenses and forms a cloud

Temperature Change An air mass will cool about 10 degrees C for every 1000 meters increase in altitude When an air mass reaches it’s condensation temperature it is said to have reached its Lifted Condensation Level(LCL)

Dew Point The temperature to which air must be cooled to reach saturation (condensation) Saturation is the point at which the air holds as much water vapor as it possibly can

Humidity The amount of water vapor in the air Relative Humidity is the ratio of water vapor in a volume of air relative to how much water vapor that volume of air can hold

Cloud Classification Clouds are classified based on their height: ▫Strato-Refers to Low Clouds(Below 2000 meters) ▫Alto-Refers to middle clouds( meters) ▫Cirro-Refers to high clouds(Above 6000 meters)

Cloud Classification Nimbus-Describes low, gray rain clouds Stratus-Describes Featureless sheets of clouds

Cloud Classification ▫Cumulus-Describes Puffy, lumpy looking clouds ▫Cirrus-Describes wispy, stringy clouds

Precipitation Precipitation occurs when enough water droplets have accumulated inside a cloud due to condensation ▫Rain ▫Snow ▫Sleet ▫Hail