What causes winds?

Uneven heating of the Earth’s surface causes winds. On being heated, the air becomes lighter and rises. As a result, a region of low pressure is created. Then, air from a high-pressure region moves to a low-pressure region, causing wind.

  • Wind’s speed is determined by how much of a pressure difference exists. The bigger the difference between the pressures, the faster the air rushes toward the low pressure.
  • As the wind blows, several things can interrupt air’s motion and make its speed vary, such as trees, mountains, and buildings.
  • Whenever air is obstructed in this way, friction (a force that opposes motion) increases, and wind’s speed slows.
  • Meteorologists also use wind measurements to tell how fast weather systems are moving, which allows them to forecast

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