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What is a liquid?

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Quick Answer

A liquid is a substance that has a constant volume but no permanent shape. As an adjective, it can be used to describe something with a smooth, flowing consistency.

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What is a liquid?
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Full Answer

In physics, liquid is one of the states of matter. As is the case of a solid's molecules, the molecules of a liquid are able to move freely. Unlike gas molecules, molecules in a liquid often stay together. A substance can exist in each of these three states at different temperatures. For example, water is a liquid but it turns into steam, which is a gas, when it is placed under high temperatures. At low temperatures, water turns to ice, which is a solid.

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