In the Northern Hemisphere the Coriolis effect deflects movement to the ___ and in the Southern Hemisphere it deflects movement to the ___.

• A. Left; Right
• B. Right; Left
• C. Right; Right
• D. Left; Left

Answer: (B)

The Coriolis effect arises from Earth's rotation and causes moving objects to be deflected in a direction that depends on the hemisphere. In the Northern Hemisphere, moving air or objects curve to the right of their path; in the Southern Hemisphere, they curve to the left. This happens because the rotation of the Earth creates a perpendicular deflection to the motion, with the sense of deflection swapping between hemispheres. A simple way to picture it: if you release something moving northward in the Northern Hemisphere, it tends to land to the east of the target, a rightward bend relative to the travel direction; in the Southern Hemisphere, the same northward motion would bend to the left. The effect is weakest at the equator and strengthens toward the poles, which is why large-scale wind patterns and cyclone rotations differ between the two hemispheres.