Question

which of these is not a physical change?
burning a candle
getting clothes wet
breaking glass

Explanation:

To determine which is not a physical change, we recall: Physical changes don't form new substances; chemical changes do (via reactions).

• Burning a candle: Involves wax reacting with oxygen (combustion), forming new substances (CO₂, H₂O, etc.)—chemical change.
• Getting clothes wet: Water adheres to fabric; no new substance—physical change.
• Breaking glass: Changes shape/size; no new substance—physical change.

So burning a candle is not a physical change.

Answer:

burning a candle