Understanding Weather

n Understanding Weather U

The Earth is surrounded by a layer of air called The f air ca the atmosphere. Weather on Earth is caused th th is caused by the heating of the air in the lower part b ower pa of the atmosphere by the Sun. The heating un. The heat and cooling of the air causes it to move causes it to mo in different ways. This movement of air is s movement of called wind. Air also contains water in the contains wa form of a gas called water vapor. The water vapo heating and cooling of air causes the water h g of air cause vapor to condense into clouds. This can va nto clouds cause it to rain or snow. cau snow ys changing e different noon. Weather from season in different

Weather is always changing. The weather in the eatWe morning may be different from the weather in morn the afternoon. Weather changes from day to day and from season to season. Weather is also different in different places. the a Activity 9.1AB ed Active

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