MasteryExams
Geography • Physical GeographyMedium

What is the primary atmospheric phenomenon responsible for the generation of the Coriolis force, which deflects winds to the right in the Northern Hemisphere and to the left in the Southern Hemisphere?

A. Thermal expansion of equatorial air masses
B. Rotation of the Earth on its axis✓ Correct Answer
C. Revolution of the Earth around the Sun
D. Differential heating of land and ocean surfaces

💡 Solution & Explanation

The Coriolis force is an apparent deflection of moving objects, including wind systems, caused exclusively by the rotational motion of the Earth on its axis, directing winds toward the right in the Northern Hemisphere and the left in the Southern Hemisphere. This force varies with latitude and wind velocity, influencing global atmospheric circulation cells. Other cyclical motions like annual revolution do not generate this inertial deflection.

🚩 Report a problem