1. The document discusses different forms of energy including heat, chemical, electromagnetic, nuclear, and mechanical energy. Heat is the internal motion of atoms. Chemical energy is required to bond atoms and is stored in fuel and food. 2. Electromagnetic energy is carried by power lines, light, x-rays, radio waves and lasers. Nuclear energy comes from the nucleus splitting or fusing atoms. The sun's energy comes from nuclear fusion. 3. Energy can be converted from one form to another through various processes like plants converting sunlight to chemical energy. Energy exists in two states - potential stored energy and kinetic energy of motion. The law of conservation of energy states that energy cannot be created or destroyed.