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Forms Of Matter and Energy By Elizabeth Harris Forms Of Energy • There are five different forms of energy. • Mechanical, Electromagnetic, Electrical, Chemical and Thermal. • Each form of energy has it’s own way of functioning. What is Mechanical Energy? • Mechanical Energy is energy due to certain motions (kinetic) or positions (potential) objects have when they collide. The energy of motion. • When skis on snow are sliding down a mountain, mechanical energy is formed between the two. Electromagnetic Energy • This energy is a form of light energy. • Cell phones use electromagnetic energy to function properly. As well as X-rays, Ultraviolet rays, and other visual light like microwaves use. Electrical Energy? • What is electrical energy? Electrical energy is energy that is caused by movement of electrons. Electrons are negatively charged and are contained inside atoms. • Electrical Energy is easily transmitted throughout things such as electricity lines that power our lights and other appliances. What is Chemical Energy? • Chemical Energy is energy that is released by chemical reactions. • Digesting food in your stomach is a form of chemical energy. When you digest food bonds are broken between the atoms which makes chemical energy. What is thermal energy? • Thermal means heat. So thermal energy is a form of energy that occurs around heat reactions. • The faster molecules move in atoms the more heat is produced. • An example of Thermal energy is friction. When you rub your hands together you create friction, or heat energy. States of Energy • How many states of energy are there? There are two states of energy. Potential and Kinetic. Both states of energy apply to certain forms of energy. What is Potential Energy? • Potential energy is energy of position- stored energy. • Potential energy can appear in many different forms of energy. What is Kinetic Energy you ask? • Kinetic energy is the energy of motion. The faster an object moves, the more kinetic energy is built up. • Kinetic energy must depend on mass and velocity. • KE = ½(mass x velocity2) • Kg m2/s2 = Newton*Meter= Joules When Energy Converses. • One common energy converse involves potential energy changing into kinetic energy. Or kinetic energy- potential. • An example would be: When you drop a ball of clay the force of the gravity on the clay coverts potential to kinetic energy. Other Conversations? • Any form of energy can be converted to another form. • Energy can not be created of destroyed as the law of conversation of energy states. • And example would be: When Electromagnetic energy comes in it produces light. When the light is produced it converts into heat. THE END! References • http://ls.fed.cuhk.edu.hk/resources/2006_4 /Prof.%20Mak%20and%20others/2%20Fr equently%20used%20energy/forms%20of %20energy.pdf • http://www.ftexploring.com/energy/PE-toKE.html