Question

Which answer below correctly identifies the changes you observed and the explanation when a candle burns?

physical change because the wax melted and changed shape

chemical change because light and heat were formed as the wick and the wax burned

both physical change because the wax melted and changed shape and chemical change because light and heat were formed as the candle burned

neither a physical change nor a chemical change because the wax only melted and light was produced from the match

Answer 1

Both physical and chemical change because the wax melted and changed shape (physical change) and the wax/wick chemically burned (combustion), producing new substances (CO2 and H2O) and releasing light and heat (chemical change).