I am a process, yet I have no end, I transform elements, and I can mend. What am I?

Category: Science · Difficulty: hard

Hint: Think about processes that repeat in nature.

Answer

A cycle

Explanation

Cycles, such as the water cycle, involve processes that repeat and transform matter.

This is a hard science riddle — a tricky one that takes a little thought. The answer is A cycle.

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