* Solid: At room temperature, wax is a solid. It is hard and has a definite shape.
* Liquid: When a candle is lit, the heat from the flame melts the wax. The wax becomes a liquid and flows down the sides of the candle.
* Gas: The heat from the flame also vaporizes some of the wax. The wax vapor rises up into the air and burns.
The process of melting and vaporizing wax is called combustion. Combustion is a chemical reaction that occurs when a fuel (in this case, wax) reacts with oxygen to produce heat and light.
The state of matter of the wax in a candle changes from a solid to a liquid to a gas as the candle burns. This is because the heat from the flame melts the wax, and then vaporizes some of the wax.
