Take a plastic ball and put a little soapy water in it. Run your finger across the mouth to make a soap film. Now, without breaking the film, run hot water over the bottle. What happens to the soap film? How does this relate to what happens to a star when it is heated?

Question

Gases do what when heated?

i don't know

http://mooni.fccj.org/~ethall/gaslaw/gaslaw.htm