Practical questions

Cards (6)

Why did we put the gauze above the ice?
To weigh down the ice so it would not float up.
What happened to the water at the top?
It was boiling.
What happened to the ice?
nothing.
What does this prove?
That liquids do not conduct heat.
Materials which trap air are good insulators as gases are unable to conduct heat.
Metals are the best conductors because they have free-flying electrons, which conduct heat.