This theory states that energy cannot be created or destroyed. It can only be transformed from one form of energy to another.
We can put this another way:
* Energy cannot be made
* Energy cannot be destroyed. It is never "used up."
Energy can just change from one form to another.
The amount of energy you start out with is the same amount of energy you end up with. Only the forms of energy change.
We did many activities and drawings to help learn about this theory.