Q45.
Consider the following factors: 1. Rotation of the Earth 2. Air pressure and wind 3. Density of ocean water 4. Revolution of the Earth Which of the above factors influence the ocean currents?
Answer
B
Explanation
Ocean currents are influenced by: (1) Rotation of Earth — Coriolis effect deflects currents clockwise in Northern Hemisphere and anticlockwise in Southern Hemisphere. (2) Air pressure and wind — trade winds, westerlies drive surface currents. (3) Density of ocean water — differences in temperature and salinity create thermohaline circulation (deep ocean currents). Revolution of the Earth (statement 4) does NOT directly influence ocean currents.