A burning candle shows both physical and chemical changes. Explain.

When a candle is lighted it, the carbon present in wax oxidises and produces carbon dioxide and water vapours as the new substances and along with it there is evolution of heat and light. This shows a chemical change. The candle also becomes smaller and smaller. When a candle burns wax melts and turns into liquid state that falls on floor and again it solidifies which shows a physical change. So burning of a candle is both a physical and a chemical change.