Natural Science CLEP Prep Practice Exam

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Prepare for the CLEP Natural Science Exam with our comprehensive study materials and practice questions. Test your knowledge and ace the exam by mastering key concepts.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is the primary source of energy for ocean currents?

Wind
Rain
Sun
Tides

The correct answer is: 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.