Question

when water turns into ice its chemical identity remains unchanged (liquid $ce{h_{2}o}$ --> solid $ce{h_{2}o}$). this means that freezing is a ______
chemical change
physical change
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Explanation:

A physical change is a change in matter where the chemical composition of the substance stays the same, only the state or form changes. When water freezes to ice, it is still $\text{H}_2\text{O}$ with no new substance formed, so this fits the definition of a physical change. A chemical change would involve forming a new substance with a different chemical identity.

Answer:

physical change