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Transcript
Question #1 What type of energy is being used in a pulley system? Answer: mechanical Question #2 A car engine can’t have an efficiency of 100% because some of the mechanical energy is converted to energy by friction. Answer: Heat or thermal Question #3 Where on the roller coaster does the car have the most potential energy and most kinetic energy? Answer: potential: point W kinetic: point X Question #4 Fill in the blanks: • Kinetic energy depends on mass and • Potential energy depends on mass and Answer: KE: depends on mass and speed PE: depends on mass and height . . Question #5 A light bulb converts to and energy energy Answer: converts electrical energy into light (electromagnetic) energy and heat (thermal) energy Question #6 What is the energy conversion when a plant goes through the process of photosynthesis? Answer: Light (EM) energy is converted to chemical energy (sugar) (100 points) Question #7 What form of energy do foods, batteries and gasoline contain? Answer: chemical energy Question #8 Which scientific law explains why you have the same total amount of energy at every point on a roller coaster? Answer: Law of Conservation of Energy Question #9 Name three units used to measure work and energy. Answer: Joule, calorie, kilowatt hour Question #10 Name one renewable and one nonrenewable source of energy. Answers: Renewable: left side/ nonrenewable: right side Question #11 Match the definition to the form of energy it describes: a. b. c. d. Energy stored in the nucleus of an atom Energy produced by moving electrons Energy stored in the chemical bonds of molecules Energy that travels in waves (ex. UV rays, visible light) Answers: a. Nuclear b. electricity d. radiant/light/electromagnetic c. chemical Question #12 What is the energy conversion when gasoline is burned to make a car move? Answer: chemical to mechanical
