It's peggy sue's birthday and she's about to blow out the candles on her cake. brother roger stops the party when he shouts: "look at that! chemical and physical changes taking places on your birthday cake! "
how would you respond to roger?
a) roger is incorrect. the melting wax is a physical change but there is no chemical change taking place.
b) roger is correct. lighting the match is a chemical change and burning the candles is a physical change.
c) roger is correct. the melting wax is a physical change and the burning candle wick is a chemical change.
d) roger is incorrect. only a chemical change is taking place as evidenced by the light and heat of the burning candles.