Which term describes a substance that is not a mixture and contains only one substance?

Enhance your knowledge of the Cambridge Science exam with our States of Matter Test. Practice with multiple choice questions and detailed explanations. Perfect your understanding for success!

Multiple Choice

Which term describes a substance that is not a mixture and contains only one substance?

Explanation:
Pure describes a substance that is not a mixture and has a single composition throughout. A pure substance can be an element, like oxygen, made of one kind of atom, or a compound, like water, made of atoms joined in a fixed ratio. Mixtures, on the other hand, contain two or more substances physically blended and can usually be separated by physical means. So, the term that best fits “not a mixture and contains only one substance” is pure.

Pure describes a substance that is not a mixture and has a single composition throughout. A pure substance can be an element, like oxygen, made of one kind of atom, or a compound, like water, made of atoms joined in a fixed ratio. Mixtures, on the other hand, contain two or more substances physically blended and can usually be separated by physical means. So, the term that best fits “not a mixture and contains only one substance” is pure.

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