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Are You Smarter Than a 8th Grader? 1,000,000 500,000 Are You Smarter Than a 5th Grader? 300,000 175,000 100,000 Grade Topic 1 Grade Topic 2 Grade Topic 3 Grade Topic 4 Grade Topic 5 Grade Topic 6 Grade Topic 7 Grade Topic 8 Grade Topic 9 Grade Topic 10 50,000 25,000 10,000 5,000 2,000 1,000 5th Grade Topic 1 Question What is potential and Kinetic Energy and give an example Topic 1 Answer Kinetic Energy is energy of motion EX: swing a bat Potential Energy is stored energy Ex: diver poised to jump in the water Return Return Topic 2 Question Give the definition of The Law of Conservation of Energy Topic 2 Answer Energy can’t be created or destroy. Return Return Topic 3 Question A piece of wood has a mass of 8.5 kg and is at rest on the top of a 100m hill. What is the weight? Show all three steps Topic 3 Answer Wt= m*g Wt= 8.5kg * 9.8m/sec2 Wt= 83.3 N Return Return Topic 4 Question A piece of wood has a mass of 8.5 kg and is at rest on the top of a 25m hill. How much Gravitational Potential Energy does it have on top of the hill? ** Need three steps Topic 4 Answer GPE= M *G *h GPE= 8.5kg * 9.8m/sec2 * 25m Or GPE= 83.3N * 25m 2082.5 J Return Return Topic 5 Question If the piece of wood is thrown off the hill so it falls at a velocity of 4m/s, what is its Kinetic Energy? Three steps Topic 5 Answer KE = M *V2 divided by 2 KE = 8.5kg * 4squared m/s = 16 * 8.5 2 2 KE= 136/2 KE= 68 J Return Return Topic 6 Question Give an example for the following Energy Conversions: a) PE KE and b) KE PE Topic 6 Answer A. Water going over a water fall/glass falling off the table b) Throw a ball straight up Return Return Topic 7 Question Where is the greatest potential energy? 8 4 3 2 1 5 9 6 7 7 10 Topic 7 Answer #4 and #8 8 4 3 2 1 5 9 6 7 7 10 Return Return Topic 8 Question Where energy? is the greatest kinetic 8 4 3 2 1 5 9 6 7 7 10 Topic 8 Answer #1, #7, #9 8 4 3 2 1 5 9 6 7 7 10 Return Return Topic 9 Question List the 5 main forms of energy and their definitions. Topic 9 Answer Mechanical- result of motion Heat- due to the internal motion of particles Chemical- found in the bounds that holds atoms together Electric magnetic- moving electrical charges Nuclear- released when the nucleus of an atom splits/ fuses Return Return Topic 10 Question Name the three energy transformations that occur in everyday life. Topic 10 Answer Conduction Convection Radiation Return Return Million Dollar Question Topic 11 1,000,000 Question Explain how two energy transformations occur in your life. 1,000,000 Answer rubbing hands together Mechanical heat moving hands Burning wood Chemical friction heats up hands stored in wood electromagnetic light (light produced)