Question

which of these are physical changes?

cutting, tearing, freezing, thawing, folding, mixing without chemical changes

burning, rusting, forming a new substance from two different substances, exploding, cooking

Explanation:

Define physical changes

Physical changes alter a substance's form but not its chemical identity.

Analyze the first option

Using the States of Matter knowledge point, processes like freezing and thawing change state, while cutting, tearing, folding, and mixing without chemical changes only alter shape or physical arrangement. No new substances form.

Analyze the second option

Processes like burning, rusting, exploding, cooking, and forming new substances alter chemical bonds, creating entirely new chemical identities. These are chemical changes.

Select the correct option

The first option correctly lists only physical changes.

Answer:

• cutting, tearing, freezing, thawing, folding, mixing without chemical changes (Correct answer)
• burning, rusting, forming a new substance from two different substances, exploding, cooking