Blown Away

Wind

What Is Wind?

Definition- the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction.


What is wind? Wind is the movement of large amounts of air. It is made up of molecules, of different type of gases, most nitrogen and oxygen. Wind is caused by uneven heating of earth's surface. It is the movement of air caused by differences in air pressure.
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Bill Nye The Science Guy on Wind (Full Clip)
What is Wind?

Local Winds

Definition- local winds are small scale convective winds of local origin caused by temperature differences.


Some winds are generated by changes in air pressure and temperatures which are Local winds . Generally move short distances and can blow in any direction. These winds may or may not change direction as conditions change throughout the day. One example of a local wind is the wind that blows on the ocean coast. During the day, the land heats up faster than the ocean. This causes a "sea breeze" that blows from the ocean into the land. During the night, the land will cool down faster than the ocean and the opposite will occur. Warm air over the water will rise and cool air from the land, called a "land breeze."

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Global winds

Definition- Global winds are created by both the spin of the Earth (Coriolis effect) and the differences in temperature between the equator and the polar areas.


If you think about the Earth has consistent wind patterns when looked at from a global scale. Global winds are created by both the spin of the Earth (Coriolis effect) and the differences (Convection Current) in temperature between the equator and the polar areas. They are grouped as trade winds, easterlies, and westerlies . Doldrums are near the equator which are the calm winds.


  • Trade winds - Trade winds occur near the equator and flow from either the north or south towards the equator. They curve towards the west due to the spin of the Earth.
  • Prevailing westerlies - In the middle latitudes of the Earth, between 35 and 65 degrees latitude, are the prevailing westerly winds. These winds blow from the west to the east and also towards the poles.
  • Polar easterlies - These winds blow close to the north and south poles. They blow away from the poles and curve east to west.
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