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Geography

Which mechanism causes cyclones to rotate counter-clockwise in the Northern Hemisphere?

A)Pressure gradient force deflection
B)Coriolis effect deflection
C)Thermal expansion of air
D)Frictional force convergence

💡 Explanation

When a cyclone forms, the Coriolis effect deflects moving air to the right in the Northern Hemisphere because the Earth rotates, influencing path relative to Earth, creating rotation. Therefore, counter-clockwise rotation arises, rather than a differing direction which involve reversal of Earth spin, or thermal effects.

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