1. What is the difference between potential and kinetic energy? Potential = Stored energy Kinetic = energy in motion At what point in the picture above do we have the most potential energy? Point 1Point 4 How are potential and kinetic energy similar? A) Neither can be created or destroyed B) Neither can be shown when the object is moving C) Both can be shown when the object is moving D) Both can be created and destroyed Correct answer: A Put the points in order of increasing kinetic energy: 1, 2, 3, 4 (increasing kinetic = least to greatest) In the picture above, how can I increase the amount of potential energy that the marble has? Add more books (increase the height) At what point in the picture above do we have the most kinetic energy?

2. What is the law of conservation of energy? A)Energy is always created B)Energy is never created or destroyed C)Energy is destroyed D)Energy is always created & destroyed Answer Choice B An ice cube is placed in a glass of soda on a hot summer day and left outside. Which of the following is the predictable pattern of heat transfer? A)The soda will get cooler and the ice cube will melt B)The soda and ice cube will stay the same temp C)The soda will get warmer and the ice cube will get cooler D)The soda will get cooler and the ice cube will stay frozen Answer Choice A A battery is placed in a flashlight. The flashlight is left on and shines for 6 hours before the battery runs out. What type of energy is decreasing in the battery as it powers the flashlight? A)Kinetic Energy B) Potential Energy C) Thermal Energy D) Nuclear Energy Answer Choice B Using the above picture, place the points in order of increasing potential energy. 4, 3, 2, 1 (increasing = least to greatest) When riding on a rollercoaster, we experience the most potential energy at the ______ point and the most kinetic energy at the _______ point. lowest; highest Nico kicked a soccer ball as shown above. How could he decrease the amount of potential energy in the soccer ball? Don’t kick the ball as high (decrease the height)

3. Define the following words: -Conduction -Convection -Radiation Conduction = heat through touch Convection = heat rises, cool sinks Radiation = heat through empty space Allisa was cooking in her kitchen when she suddenly slipped and fell on the hot stove. What type of heat transfer is she experiencing? A)Conduction B)Convection C)Radiation Answer Choice A What type of heat transfer is Shown in the picture above? Explain your answer A)Conduction B)Convection C)Radiation Radiation because the heat is being transferred through empty space What type of heat transfer is being shown at each letter? A= Conduction (touch) B= Convection C= Radiation (empty space) Homer grabbed a hot toaster!! What kind of heat transfer is he experiencing? A)Conduction B)Convection C)Radiation A Conduction (touch) Pictured above are churros under a heat lamp. How are the churros in the middle of of the pile Receiving heat? A) Conduction B) Convection C)Radiation Conduction – the churros in the middle are touching the churros on the top of the pile A B C

4. The minions are being warmed by the sun. How are they Receiving the heat? A)Conduction B)Convection C)Radiation Answer Choice C (the heat is moving through Empty space) The reason you drop to the ground When there is fire. A)Conduction B)Convection C)Radiation Answer Choice B – the smoke (heat rises) Answer Choice C: heat through empty space The picture above shows heat transfer through A) Conduction B) Convection C) Radiation Answer Choice C – heat through empty space A – heat transfer through touch When heat moves, it moves: A)From hotter objects To colder objects B) From colder objects to Hotter objects C) It doesn’t move at all Answer Choice A Pictured above are churros under a heat lamp. How are the churros on top of of the pile receiving heat? A) Conduction B) Convection C)Radiation The picture above shows heat transfer through A) Conduction B) Convection C) Radiation

5. Identify the energy transformation Of the flashlight pictured above. _______  _______  _______ Chemical  Electrical  Light Identify the energy transformation Homer is going through when he eats cake and then goes and works out. ______  ______ Chemical  Mechanical Collin got a new iPhone 6 over the weekend. What kind of energy transformation is taking place to power his phone? ______  ______  ______ Chemical  electrical  Light/Sound What is the energy transformation being shown in this picture? _____  ____  ____ Chemical  Electrical  Light What is the energy transformation of the fan pictured above? _______  _______ Electrical  Mechanical What energy transformation is the gasoline power car pictured above going through? ___  (3 energy types go here) Chemical  Mechanical/Thermal/Sound

6. What energy transformation is the wind turbine going through to power the homes shown above? ______  ______ Mechanical  Electrical What kind of energy is found in a battery? Chemical Energy What kind of energy is found in food? Chemical Energy True or False: When energy changes from one form to another, the energy is destroyed. False – energy is NEVER destroyed What energy transformation is the above speaker going through to play music? ______  ______ Electrical  Sound What energy transformation is the above solar panel going through to power the house? _______  _______ Radiant (Light)  Electrical

7. What kind of pulley is pictured above? How did you know? Fixed Pulley– the pulley is attached to the ceiling Moveable Pulley – the pulley moves on the string Identify the pulley pictured above and give an advantage of using this type of pulley. It’s a fixed pulley and it changes the direction that you lift the load When using a fixed pulley, the amount of force _____ and the direction the load moves _______. Force stays the same Direction the load moves changes When using a moveable pulley, the amount of force _____ and the direction the load moves _____. Force decreases Direction the load moves stays the same Which pulley system pictured above would require the least amount of force to lift the load? Explain Figure 4 – the more pulleys you add, the less amount of force needed What kind of pulley is pictured above? How did you know? Figure 1 Figure 2 Figure 3 Figure 4

8. When using an inclined plane, the amount of force needed to lift the load _________ and the distance the load moves ____________. Force decreases Distance increases As we increases the distance of an inclined plane what happens to the amount of force needed to move the load? The force decreases True or False: When using a simple machine, the amount of work ALWAYS stays the same. True What is a disadvantage of using an inclined plane? It increases the distance that you move the load An inclined plane reduces the force needed to move an object by- A)Decreasing the pull of gravity B)Decreasing the mass of the object C) Increasing the distance the load has to move Answer Choice C A pulley attached to the object to be moved, which reduces the force needed to move the object is called a – A)Fixed Pulley B)Moveable Pulley C)Fun Pulley Answer Choice B

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