Good morning class! Energy is all around us in many forms, solar, electrical, chemical, bio-chemical, mechanical, atomic, are own bodies uses all that I have listed. To use energy we have to have it in a form necessary for the work we want it to do. We have to change its form to the form we need. We regulate it, we convert it, we store it, and we cannot destroy it. Energy after we use it, it returns to its natural state. Think of this; take a pan of water set it on a flat level surface, look at the water, it is clam, now put your hand in it. The water forms around your hand, it rises in the pan, now take your hand out, the water returns back to the state that it was when we started.