2. Types of Energy 1.Chemical potential or kinetic in atoms electrons (-) negative charge protons (+) positive charge neutrons no charge charges create chemical energy

3. in our bodies contained in atoms -proteins and chemicals food converted into energy -metabolism exhale heat energy measured in calories (kilocalories) Kcal = the amount of heat required to raise 1 kilogram of water 1 0 C we burn this as energy

4. in chemicals gasoline acids base 2. Heat Energy –thermal potential and kinetic burning coal or oil steam turns a turbine energy that is produced or is a result of a chemical reaction

5. 3. Radiant energy potential or kinetic SUN -through chemical reactions on the sun transferred to the earth through the atmosphere radio waves, visible light, ultraviolet light

6. 4. Mechanical energy potential or kinetic machines makes work easier for us -mechanical advantage 5. Electrical energy -wire potential or kinetic energy

7. electrons move uses a magnetic field turns motors, powers all of our electrical equipment activates electrical activity in storms -lightning, static, electrical

8. 6. Sound energy vibrations waves of pressure in air or water 7. Nuclear energy potential or kinetic atoms change -split –fission, combine –fusion heat, light, explosions

9. Energy in a System A system is a set of objects working together to accomplish a job The amount of energy within a system remains constant. It only changes forms Example a person creating heat with sticks

10. System