Energy and Matter Energy Energy the ability to do work Work Work a force moving matter through a distance Both energy and work are measured in joules (J). Forms of Energy Mechanical ? objects Kinetic ? moving Potential ? stored Thermal ? kinetic energy of atoms and molecules Forms of Energy Acoustic (sound) ? periodic, wave-like motion of atoms and molecules Electromagnetic ? moving electrons Chemical ? breaking and forming bonds Forms of Energy Nuclear ? from center of atom 6 Energy Conservation Despite Change ?the study of the flow of energy? Thermodynamics ?the law of conservation of mass-energy? (Conservation doesn?t refer to turning off the lights.) First Law of Thermodynamics ?the law of conservation of mass-energy?