Rabu, 13 Januari 2010

Air and The Respiratory System

Air is All aound Us

Air is everywhere! you cannot see it but there are ways to tell that is it there. You can feel or even hear air when it moves.
Moving air is called wind. a strong gust of wind can move things, like Sue's hat. around. We can also see things around us move when the wind blows.
Typhoons are common in some parts of the world. These are violent winds that are accompanied by very heavy rain.

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