What can rise and fall, influenced by the moon, creating rhythms across the vast blue?

Category: Science · Difficulty: easy

Hint: Think about the movement of water in relation to celestial bodies.

Answer

An ocean tide

Explanation

An ocean tide is the periodic rise and fall of sea levels caused by the gravitational forces of the moon and sun.

This is an easy science riddle — a good one for children and beginners. The answer is An ocean tide.

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