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GMAS 5th Grade Science Practice Test

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A conductor is a material that:
Correct Answer:
Allows Electric Current To Flow Easily
Explanation:
Electric current is the flow of electrons through a material. A conductor lets that flow happen easily because it has many free electrons and low resistance. Metals like copper and aluminum are good examples, which is why wires are made from them. In a simple way, a conductor provides a smooth path for electrons to move. That’s why the best description is a material that allows electric current to flow easily. The other ideas describe different properties: something that blocks electricity is an insulator, not a conductor; reflecting heat relates to how a material handles heat, not electricity; and being an insulator is the opposite of a conductor.

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