What is the only substance that Thermal energy can be applied to?

The _____ in the solid are given more ______ and their ________ increases.

What happens to the increased vibrations?

This increases the average _______ ______ in the material and so does the ___________.

In general are metals good conductors of heat?

Why are metals good conductors of heat in general?

When the metal is heated what do the free electrons do?

They move from the ___ end of the rod towards the ____ end of the rod.

When they bump into each other _____ and electrons , they pass on the ____ _________.

This means that the ____ is transfered more quickly with the ____ _________ than with just the slower moving _____.

___ ________ solids such as plastic , _____ and ceramic are ____ conductors. They do not contain ____ _________ so heat is only conducted by the slower moving __________.

Liquids (like water) are also poor __________. Air a very ____ conductor. It is often called an __________.

_______ ____ such as wool and wood are particularly good __________. This is because ___ __________ are trapped inside the material.

_____ _______ are made of non conducting fabric. ______ ______ take advantage of the ultimate insulator against conduction -a ______.

Defenition of convection.