Heat transfer

Heat Energy can be transferred from one object to another in different ways.

When two objects are in contact, thermal energy is transferred from the hotter object to the colder object.  This is called CONDUCTION. The molecules in the hotter object are moving faster, and they transfer their energy to the molecules in the colder object.

But, what is a molecule?

Molecules are the smallest part of any substance. They are made up of two or more atoms linked together.  Here is a water molecule. It has two atoms of Hydrogen and one atom of Oxygen.

Thermal energy travels through a gas or liquid by CONVECTION.

Thermal energy can be transferred through space by electromagnetic waves. This is called RADIATION.

 Here is a presentation:

Heat Transfer from guest451a35