1. Melting Ice: Ice (solid water) changes into liquid water. The chemical composition (H₂O) remains the same, just the state of matter changes.

2. Boiling Water: Liquid water changes into water vapor (gas). Again, the chemical composition doesn't change, only the physical state.

3. Cutting Paper: Paper is divided into smaller pieces, but the chemical makeup of the paper remains the same.

4. Freezing Juice: Liquid juice transforms into solid juice. The chemical composition of the juice doesn't change, only its physical state.

5. Dissolving Sugar in Water: Sugar crystals disappear into the water, but the sugar molecules are still present, just dispersed throughout the water.

6. Crushing a Can: A metal can is deformed, but its chemical composition (aluminum or steel) remains the same.