Day 3 Day 2 Recap Yesterday we participated

Day 3

Day 2 Recap • Yesterday we participated in a lab that helped us to deepen our understanding of potential and Kinetic Energy. • At what point was the ball filled with kinetic energy? Potential energy? • When did the coin exhibit kinetic energy? Potential? • Describe the point in which potential energy was transformed into kinetic energy and vice versa in each station.

Introduction • Today we’re going to learn about the different forms of energy and how energy is transformed from one form to another. • In the last few days we have learned about Potential and Kinetic energy and how energy is transformed between the two. • Now we will learn about the different forms of energy and how each form is either a form of potential or kinetic energy.

Learning Target Students will be able to investigate and describe the transformation of energy from one form to another.

Homework Review • Mechanical energy • Sound energy • Chemical Energy • Thermal Energy

Six Forms of Energy Mechanical Chemical Heat/Thermal Sound Energy Electrical Light/Radiant

Mechanical Energy • Energy that moves objects from place to place Examples: 1. kicking a ball 2. water flowing in a stream 3. tires rolling down a road 4. sound waves from your i. Pod.

Chemical Energy • Energy released by a chemical reaction Examples: 1. food you eat contains chemical energy that is released when you digest your meal 2. Wood, coal, gasoline, and natural gas are fuels that contain chemical energy

Electrical Energy • How is electrical energy used in your home? How is it used outside your home? • It can be generated at a power plant or inside a battery and can power everything from remote-controlled cars to refrigerators • Lightning and static electricity are also forms of electrical energy

Heat (Thermal) Energy • Energy created by the motion of atoms and molecules that occurs within an object • Thermal energy exists when you heat a pot of water on a stove

Light (Radiant) Energy • Energy that can move through empty space Examples: 1. The sun and stars are powerful sources of radiant energy 2. The light given off by light bulbs and campfires are also forms of radiant energy

Sound Energy • Sounds that we hear are caused by the vibration of particles in the air or vibration of the object itself.

Energy Forms • These forms of energy do work that end up as motion, light, or heat. • Energy is used to power manufacturing, light buildings, propel vehicles, and communicate messages. What else do we use energy for?

Energy Transformation • All forms of energy can be converted into other forms of energy

Let’s Try Another One How many energy transformations can you identify in this image? Discuss and be ready to share out.

Now Try it on Your Own. . . Try to identify the energy transformation on your own.

Law of Conservation of Energy With every transformation, some energy is converted to less useful forms. Energy conversions are not 100% efficient. Ex: the electrical energy that’s being used to power the light bulb isn’t fully being converted to light energy. So of it is lost as heat energy. 100 J electricity in 95 J heat out 5 J light out

Flashback. . . What’s a Law? ● Law: A description about how some aspect of the natural world behaves under stated circumstances. ● So why is the Law of Conservation of Energy a law? It simply describes how energy behaves when transferred. It is always conserved.

Summarize Your Learning Describe what we learned about energy during today’s lesson. Explain how energy transformations provide evidence for the law of conservation of energy.