Question

Why is it a physical change to freeze water? (1 point)
• A temperature change occurs.
Heat is released during the process.
• Only a phase change occurs.
O The new and original
substances are different.

Answer 1

Freezing water is considered a physical change primarily because **only a phase change occurs**. The chemical composition of water remains the same (it is still H2O), whether it is in liquid or solid form (ice). The change is reversible, and while heat is released during the freezing process, the key reason it is a physical change is that the substance itself does not change.