Natural Science CLEP Prep Practice Exam

What affects the movement of oceanic currents?

1. Temperature

2. Atmospheric pressure

3. Lunar-tide gravity

4. All of the above

The correct answer is: All of the above

Oceanic currents are impacted by a variety of factors, including temperature, atmospheric pressure, and lunar-tide gravity. These three elements work together to create dynamic and complex currents in the ocean. Temperature differences can cause water to expand or contract, affecting its density and therefore its movement. Changes in atmospheric pressure can cause winds, which in turn can influence the direction and speed of ocean currents. And the gravitational pull of the moon as it orbits the Earth can create tidal forces that also impact oceanic currents. Therefore, all of these factors play a role in the movement of oceanic currents, making option D the correct answer.