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17/10/2013 Energy is all around us…. Forms of Energy Junior Science Forms of Energy …it can take many forms. The five main forms of energy include: Heat Chemical Electromagnetic Nuclear Mechanical Potential Energy All Energy can be classified as being either… Stored Energy (Potential Energy) Energy in Action (Kinetic Energy) The stored energy in a body due to its position or shape. An objects has potential energy because a force has moved or changed it in someway. When an object releases its stored energy it is converted into another form of energy 1 17/10/2013 Kinetic Energy Energy can converts from one Kinetic Energy is the energy found in moving objects. form to another And.... it can also spread out until it is not noticed any more. The more kinetic energy an object has the faster it moves. Sound When an object slows down its kinetic energy is converted into another type Heat of energy Heat Energy Light Energy Electrical Energy Sound Energy Nuclear Energy Chemical Energy Magnetic Energy Mechanical Energy What is Thermal Energy? Heat Energy Chemical Energy Heat energy The heat energy of an object determines how active its atoms are. A hot object is one whose atoms and molecules are excited and show rapid movement. A cooler object's molecules and atoms will show less movement. 2 17/10/2013 What is Chemical Energy? What is Electromagnetic Energy? Light energy Energy that is available for release from chemical reactions. o Includes energy from gamma rays, xrays, ultraviolet rays, visible light, infrared rays, microwave and radio bands The chemical bonds in a matchstick store energy that is transformed into thermal energy when the match is struck. Electrical Energy What is Electrical Energy? Energy caused by the movement of electrons Electrical energy is easily transported through power lines and converted into other forms of energy Mechanical Energy What is Mechanical Energy? Energy due to a object’s motion (kinetic) or position (potential). The bowling ball has mechanical energy. When the ball strikes the pins, mechanical energy is transferred to the pins! 3 17/10/2013 Examples of Mechanical Energy Class Challenge Draw a flow map showing the flow of energy transformations in a car from starting vehicle to driving. Target 5 energy changes Hint: The Primary Energy source is the battery. Energy Transfer Sound (mechanical) Thermal Electrical Mechanical Chemical Light (Electromagnetic) 4