Essential Energy Lesson 1 There are five forms of Energy in Action • • • • • Heat Light Electrical Sound Movement (Kinetic) Lesson 2 There are 4 types of stored energy Stored = potential = about to happen later • Gravitational PE – energy stored in things when they are high up • Chemical PE – energy stored in chemicals • Nuclear PE – energy stored inside the nucleus of atoms • Strain PE – energy stored in things when they are stretched or squashed Energy Changers 3 • • • • • • Gas fire Bow and arrow Radio Hair straighter TV Lift going up • Guitar string • Microphone • Battery torch chemical PE heat Strain PE kinetic electrical sound electrical Heat electrical sound + light electrical movement + gravitational PE movement sound sound electrical chemical PE light + heat Gravitational PE Kinetic Position Type A Kinetic B Gravitational PE + Kinetic C Gravitational PE Roller Coaster Energy Gravitational Potential Energy • Gravitational PE Kinetic Energy • Gravitational Potential energy can be to power a radio Lesson4 Wasted Energy • Most machines waste energy in the form of heat and a little noise. • The heat and sound spread out into the surroundings and becomes useless. • Energy is never completely disappear it is only wasted and spreads out. • In a car engine 30% of the energy from the petrol is converted into kinetic energy to produce movement – the rest of the petrol's energy is converted to heat and sound energy. • Video on energy transfers of in a car • Link to PowerPoint on energy transfers and waste Lesson 4 Sankey Diagram for old fashioned filament light bulb Only 10% is actually converted into light Lesson 4 Sankey Diagram for energy saving light bulb 75%% is converted into light Lesson 4 Sankey Diagram for Coal fired power station Lesson 4 Sankey Diagram for Petrol Engine Lesson 4 Sankey Diagram for Human Body Lesson 4 Sankey Diagram For a Microwave oven Kinetic Microwave Total Energy from mains electrical supply Lesson 4 Sankey Diagram For a Car Kinetic 30% Car Total Energy from Chemical PE in petrol 100% Lesson 6 Pendulum Challenge • • The period of a pendulum is the time a pendulum takes to swing forward and back to its stating point Equipment – – – – – – • • • • String Pendulum bob Meter stick Timer Clamp stand Wooden dowel You have to find out what length of string will give a period of 1 second in other words 60 swings in one minute In groups decide upon a plan and carry out the investigation. You will be changing the length but what ting should you keep the same during the experiment in order to make it a fair test Make a poster showing with a clear diagram of your equipment, a note of how you did the experiment and your results.