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Problem 15 - Olympiad

How is wind primarily generated on Earth?

A. By the rotation of the Earth.B. By the moon's gravitational pull.C. By the uneven heating of the Earth's surface by the sun.D. By large bodies of water expanding and contracting.

Correct: C

The sun heats different parts of the Earth's surface unevenly, causing variations in air temperature and pressure. Air moves from areas of high pressure to areas of low pressure, creating wind.