What was the purpose of Miller and Urey's experiment?

The purpose of Miller and Urey's experiment was to test Oparin's hypothesis about the conditions for the formation of organic molecules on early Earth.

American chemists Harold Urey and Stanley Miller performed a simulation experiment to prove the molecular evolution of life.

Thus, the aim of Miller and Urey's experiment was to test  Oparin's hypothesis about the conditions for the formation of organic molecules on early Earth.

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The purpose of the Miller and Urey experiment was to see if organic compounds that could sustain life be created spontaneously in Earth's early atmosphere. They wanted to see if complex molecules of life (eg. Amino acids, etc.) could be created using natural chemical reactions when Earth had harsh conditions.

Explanation:

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.