A mixture made of two or more elements, at least one of which is a metal.

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Multiple Choice

A mixture made of two or more elements, at least one of which is a metal.

Explanation:
An alloy is a substance formed when two or more elements are combined, with at least one metal. This describes a mixture where a metal is part of the combination, and the resulting material often has properties different from its components. Examples like steel (iron plus carbon), bronze (copper plus tin), and brass (copper plus zinc) illustrate how combining elements creates new materials. The other options don’t fit because bacteria are living organisms, a cell is a basic unit of life, and a food chain is a sequence of feeding relationships in an ecosystem.

An alloy is a substance formed when two or more elements are combined, with at least one metal. This describes a mixture where a metal is part of the combination, and the resulting material often has properties different from its components. Examples like steel (iron plus carbon), bronze (copper plus tin), and brass (copper plus zinc) illustrate how combining elements creates new materials. The other options don’t fit because bacteria are living organisms, a cell is a basic unit of life, and a food chain is a sequence of feeding relationships in an ecosystem.

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