Craig’s Video (Note: I actually used to seperate videos, but I'm having trouble locating the other one) http://www.youtube.com/watch?v=kecvK2zeJ4U Philhellenes Video http://www.youtube.com/watch?v=wbrQI0r1B7w Link on the Law of Conservation http://bioweb.wku.edu/courses/Biol280/280mat.HTML "3) Energy changes: What energy changes occur when you drop a rock? Because of its higher position, the rock in your hand has a higher potential energy than the same rock at rest on the ground. When you drop the rock and it hits and eventually rests on the ground, the rock now has a much lower potential energy. Has the amount of energy changed (i.e., the rock lost energy - where did it go?) At first glance it seems so. But according to the first law of conservation of energy, in any ordinary physical or chemical process is neither created nor destroyed but merely change from one form to another. "