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Goals Define Energy 2. Describe different forms of energy 3. Explain the Law of Conservation of Energy 4. Identify sources of energy loss. 1. Vocabulary Energy: the ability to do work Kinetic Energy: energy of a moving object Potential Energy: energy stored because of the position of an object What is energy? Energy is the ability to do work. Work transfers energy from one object to another EX: lifting a box transfers energy from you to the box. There are 2 main categories of energy. Potential (stored energy) Kinetic (moving energy) Types of Potential Energy Chemical Energy Energy stored in bonds between atoms Found in food, batteries, gasoline, etc. Types of Potential Energy Elastic Energy stored in stretched/compressed objects Examples: stretched rubber band, compressed spring Types of Potential Energy Gravitational Energy stored in objects that can fall Types of Kinetic Energy Thermal Energy Energy of moving atoms Faster atoms = more heat SLOW: SOLID MEDIUM: LIQUID FAST: GAS TURBO: PLASMA Types of Kinetic Energy Motion Energy Found in moving objects Types of Kinetic Energy Electrical Energy Moving streams of electrons Types of Kinetic Energy Light Energy Waves of energy Includes light waves, radio waves, x rays, gamma rays, microwaves Types of Kinetic Energy Sound Energy Waves of energy moving through atoms. Total Energy Objects can have both potential and kinetic energy at the same time. Ex. At the top of a rollercoaster, riders are both moving and could also fall down. Conservation of Energy Energy cannot be created or destroyed Universe always has the same amount of energy Energy can be transferred. Examples (choose one to write) In your body, chemical energy from food is changed to motion energy as you move your hand to take notes. Light Energy from the sun is captured by plants and stored in chemical energy of sugar molecules. Motion energy of falling water is changed into electrical energy at the Garrison Dam. Conservation of Energy Some energy is often lost as heat(thermal energy) Examples: *choose one to write Car engines are warm after driving. People warm up when working out. Light bulbs get hot when left on.