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Do Now 4/23/14 1. Describe what comes to mind when you think of energy. 2. How do you get energy? 3. Where do you see energy around you? Today, we will be able to… Define the different forms of energy (kinetic, potential, chemical, thermal) and explain the law of conservation of energy Agenda Do Now The Brownie Dilemma Energy and Its Types Heat Transfer Passage Heat Transfer Stations Independent Practice Exit Ticket 10 min. 5 min. 15 min. 10 min. 25 min. 10 min. 10 min. The Brownie Dilemma https://www.youtube.com/watch?v=fBeJPpeeYJQ Agenda Do Now The Brownie Dilemma Energy and Its Types Heat Transfer Passage Heat Transfer Stations Independent Practice Exit Ticket 10 min. 5 min. 15 min. 10 min. 25 min. 10 min. 10 min. ENERGY • Ability to generate heat or do work • Heat – energy transferred when a temperature change occurs • Work – energy transferred when force is applied to cause a change in position • Measured in Joules (J) Kinetic Energy • Energy of motion • Anything that is moving has KINETIC ENERGY Potential Energy • Energy stored because of physical position or chemical composition • Potential energy is converted to kinetic when stored energy is released Chemical Potential Energy • Energy stored in chemical bonds • Amount of chemical potential energy is determined by its composition • Kinds and positions of atoms • Kinds and numbers of chemical bonds Thermal Energy • Energy due to random movement of particles • Temperature – measurement of the average ___________ energy of particles • What does a change in temperature mean? Law of Conservation of Energy • Energy cannot be created nor destroyed, only transformed • There is a fixed amount of energy in the universe • Initial Energy = Final Energy Observable Forms of Energy • Heat • Light • Motion • Sound • Electricity Agenda Do Now The Brownie Dilemma Energy and Its Types Heat Transfer Passage Heat Transfer Stations Independent Practice Exit Ticket 10 min. 5 min. 15 min. 10 min. 25 min. 10 min. 10 min. How can energy be transferred? Read the Comparing Models Passage and answer questions independently. 7 minutes How can energy be transferred? • Conduction: collision of particles • Convection: flow of fluids at different temperatures • Radiation: due to electromagnetic waves SHOW ME YOUR MOVES Conduction, Convection or Radiation? Agenda Do Now The Brownie Dilemma Energy and Its Types Heat Transfer Passage Heat Transfer Stations Independent Practice Exit Ticket 10 min. 5 min. 15 min. 10 min. 25 min. 10 min. 10 min. Agenda Do Now The Brownie Dilemma Energy and Its Types Heat Transfer Passage Heat Transfer Stations Independent Practice Exit Ticket 10 min. 5 min. 15 min. 10 min. 25 min. 10 min. 10 min. Independent Practice 1. 2. 3. 4. What is chemical potential energy? Where is energy stored in chemical compounds? Describe the Law of Conservation of Energy. Describe a real-world example of the Law of Conservation of Energy that applies to chemistry. 5. List three real-world examples of each type of heat transfer (conduction, convection, and radiation). Agenda Do Now The Brownie Dilemma Energy and Its Types Heat Transfer Passage Heat Transfer Stations Independent Practice Exit Ticket 10 min. 5 min. 15 min. 10 min. 25 min. 10 min. 10 min. Exit Ticket 1. Which of the following best describes the 3. A man who was sleeping wakes up because potential and kinetic energy changes as a car he hears the smoke alarm go off in his house. drives to the top of a hill and stops? Before opening the bedroom door, the man feels the door to see whether it is warm. He is A. Potential energy increases, kinetic energy assuming that heat would be transferred decreases through the door to his hand by— A. Conduction B. Potential energy decreases, kinetic energy increases B. Convection C. Radiation C. No energy change takes place D. Compression D. Both potential and kinetic energy decrease 2. An inventor claims to have created an internal 4. Which of these is the best example of heat combustion engine that converts 100 kJ of transfer by radiation? chemical energy from diesel fuel to 140 kJ of mechanical energy. This claim violates the law of A. A satellite is warmed by sunlight the conservation of – B. Butter melts on warm bread A. Momentum. C. A ceiling fan cools a warm room B. Inertia. D. Puddles of water cool a warm tile floor C. Mass. D. Energy.