Wind is simply air in motion.
We are able to see the wind by watching the movement of the objects it is blowing around.
Wind is produced by the uneven heating of the earth's surface by the sun, therefore since the earth's surface is made of various land and water formations, it absorbs the sun's radiation unevenly.
The surface then heats the air right above it causing the air to rise and allowing the cooler air to fall.
This sends the air into motion and the wind is created.
The bigger the contrast of the temperatures in the atmosphere the stronger and faster the wind becomes.
Two factors are necessary to measure wind is speed and direction.
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