Question

change of phase is a process whereby matter changes form (solid, liquid, gas).Which one of the following constitutes a phase change?
*Burning of wood
*digestion of food
*exhaling
*melting of candle wax
*photosynthesis

Answer 1

Melting of candle wax. Solid wax becomes liquid. You can try it home :)

Answer 2

melting of candle wax. (starts off a solid, then burn it with a candle and it becomes a liquid, last, it will evaporate and become a gas