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September 10, 2015 1. PowerPoint “What is Energy?” 2. Possible Video “Exploring Heat” Subject Area: What is Energy? EQ: What are the different types of energy? Side Questions: 1. How is potential energy different from kinetic energy? 2. What is thermal energy? Please enter the class, get your Science Notebook out, and sit quietly writing your Essential Question and your side questions. You might get tickets!!! Energy When you put a pizza into the oven, it was just soft dough covered with cold tomato sauce, cheese, and uncooked vegetables. Now, the dough is crisp and golden, the sauce is hot, and the veggies are toasted. What caused these changes? What is Energy? All the changes around you are caused by Energy. Energy is the ability to cause change. There are different forms of energy. Kinetic Energy Kinetic Energy is the energy an object has because it is moving. The amount of energy an object has depends on two things. The objects mass and the objects speed. The kinetic energy of each vehicle depends on its mass and speed. The truck has more kinetic energy than the blue car because it has more mass. The blue car has more kinetic energy than the green car because it is moving faster. Units of Energy Energy is measured in units of joules (J). If you dropped a softball from a height of about .5 meters, it would have about 1J of kinetic energy before it hit the floor. Potential Energy – Stored Energy An object can have energy even when it is not moving. Stored energy is called Potential Energy. There are different forms of potential energy. The block is the Potential Energy, the energy is stored. When the line is cut the potential energy is changed into kinetic energy falling and smashing the post. Gravitational Potential Energy A rock hanging above the ground is an example of gravitational potential energy. Elastic Potential Energy If you have ever stretched a rubber band and let it go then you have discovered another potential energy. Elastic Potential Energy is the energy stored when and object is squeezed or stretched. When you stretch a rubber band the potential energy is increased. Elastic Potential Energy A spring has elastic potential energy when it is compressed or stretched. Chemical Potential Energy Chemical Potential Energy is the energy stored in bonds between the atoms that make up matter. Light Energy Sunlight causes plants to grow because sunlight contains a form of energy called light energy. Light Energy is the energy carried by light waves. Thermal Energy Thermal Energy is the energy that moves from one place to another because of differences in temperature. Thermal energy is sometimes called heat energy. Thermal energy always moves from warmer objects to colder objects. Thermal energy causes your hands to feel warmer when you hold a cup of hot cocoa. “Energy Work and Power” What did you know? 1. ________________________________ 2. ________________________________ 3. ________________________________ What did you learn? 1. ________________________________ 2. ________________________________ 3. ________________________________ What do you want to know? 1. _________________________________ 2. _________________________________ 3. _________________________________