Question

which of these are examples of physical changes? check all that apply. burning wood freezing water cutting paper iron rusting mixing water and acetone

Explanation:

Physical changes do not change the chemical composition of a substance. Freezing water is a phase - change (solidification) without altering water's chemical identity. Cutting paper only changes its physical form. Mixing water and acetone is a physical combination without a chemical reaction. Burning wood is a chemical reaction (combustion), and iron rusting is a chemical reaction (oxidation).

Answer:

• freezing water
• cutting paper
• mixing water and acetone