Which of these is an example of a physical change?
A
Burning wood
B
Rusting iron
C
Baking a cake
D
Melting ice
Correct Answer: Option D — Melting ice
Explanation:
Melting ice is a physical change because the water molecules remain chemically the same; only the state changes from solid to liquid. Burning, rusting, and baking all involve chemical reactions that form new substances.