Which of the following are physical changes and which are chemical changes ?Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.

Physical change	Melting of candle wax, mixing of iron filings and sand, breaking of chalk, and cutting of paper.
Chemical change	Burning of candle wax, burning of wood, and burning of paper.