Wind How is wind created? • Wind is created_____________________________________________________________________________. • Some parts of the Earth’s surface receive ____________________ from the sun all year long and are always ____________, and some parts receive ____________________________________, so the climate is ____________. • __________________________________________________________________________________________ __________________________________________________________________________________________ Wind Speed • Remember, air molecules want to move from areas of _________________________ to areas of ____________________ • Two air masses next to each other with large differences in pressure, ________________________________. • ________________________________________________________________________________________. Cloud Cover • Cloud cover describes the __________________________________________________________________. • During the day, clouds block ______________________________ from the sun, which keeps temperatures on the ground ________________. • At night, clouds act like a giant _______________ and keep the ground temperatures ________________ because they keep radiation from ________________ back into the atmosphere. Clouds - Clouds form when air _______________________ .Clouds are made of tiny drops of ___________.These drops stick to ___________ and other _________________________________ in the air. Status Clouds - These clouds are formed when a mass of warm air is slowly pushed up over a mass of cooler air or over a mountain. - Stratus means “___________,” and these clouds form layers. These clouds can produce rain or snow. - Stratus clouds are __________________________________________________________________. - Sometimes they look like a ___________________________________________________________. - Some stratus clouds bring rain. Cumulus Clouds - These clouds form when large bubbles of warm air rise rapidly into the atmosphere. - Cumulus clouds have ___________________________________________________________________. - Small white cumulus clouds mean _________________________________. - They are usually ________________ than stratus clouds. - Sometimes these clouds become big and dark. Then they are _____________________________________. They bring ______________________________________________________________________________. - Cumulus means “_______________.” Although these clouds usually mean fair weather, they can produce light rain or snow showers. Cirrus Clouds - Cirrus clouds form _____________________________________________________________________. - They are _____________ and look like feathers in the sky. They are also thin and you can see through them. They are made mostly of __________________________. - You see these thin clouds in fair weather, but rainy weather often follows in a day or two. - Cirrus means “________________” .Cirrus clouds usually mean good weather. However they may signal a that a change in weather conditions is coming.