Natural Science CLEP Prep Practice Exam

Question: 1 / 400

What is the primary source of energy for ocean currents?

Wind

Rain

Sun

Ocean currents are primarily driven by the sun. The sun's energy helps to heat the Earth's surface, including the oceans, which causes the water to expand and become less dense. This warm water then rises to the surface, creating currents and circulation around the world. While wind and tides also play a role in ocean currents, they are secondary sources of energy compared to the sun. Rain is not a source of energy for ocean currents, as it is a result of the water cycle rather than a driving force.

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