500
Explain why the balloon did not pop when it had water in it. Use both heat transfer words that begin with C's in your explanation.
As the flame transfers heat energy to the balloon, conduction occurs (transfer by contact) between the balloon and the water. Then convection (transfer by mixing) occurs as the hot water rises, then cools and sinks back down. This transfer of energy allows the water to continually absorb the heat energy and prevents the rubber balloon from absorbing it and popping.