How would you respond to Roger?
Responses
A Roger is incorrect. The melting wax is a physical change but there is no chemical change taking place.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.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.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.
1 answer
The best response to Roger's statement would be:
C. Roger is correct. The melting wax is a physical change and the burning candle wick is a chemical change.
This response accurately identifies that the melting wax alters its physical state but can be reversed (solid wax to liquid wax), which is a physical change. In contrast, the combustion of the wick involves a chemical change, as it produces new substances (like carbon dioxide and water vapor) and cannot be reversed.
