Final answer:
Physical changes involve alterations in physical properties without changing the chemical composition of a substance.
Explanation:
Physical changes involve alterations in physical properties of a substance without changing its chemical composition. For instance, when ice melts into water, it remains H2O despite the change in state.
During a physical change, the arrangement of particles may change but the chemical composition remains the same, showcasing a shift in physical characteristics without modifying the substance's identity.
An important distinction between physical and chemical changes is that in physical changes, the substance's chemical nature remains unchanged.
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