Section 1: Energy Changes Barr Batten The ability to cause change Examples: Energy in a thunderstorm Pedaling a bike Which has the ability to cause change? Bowling ball at rest or bowling ball moving Energy due to motion Answer kinetic or not: Mass mass = kinetic energy Speed speed = kinetic energy Read p. 165 in groups Be prepared to answer these questions: 1. What is the fastest a baseball has been thrown? What is its kinetic energy? 2. How can a tiny proton that bombards the earth have the same kinetic energy as the baseball? 3. Write your own question based on the reading. Can be transferred when objects collide Ex: bowling pins Ex: dominoes Kinetic Energy Can you have energy if youre not moving? Yes, stored energy is called potential energy Which has more potential energy? Height = potential energy Can you give me an example? Law of Conservation of energy - energy cannot be created or destroyed (only changes form) Rub your hands together Look at Figure 10 p. 169 How does energy get transformed when you kick a soccer ball? Total amount of energy in the universe does not change