ENERGY INTRODUCTION Energy – Lesson 1

Science Essential Question How do we know that things have energy? Science Essential Question

Science Essential Question How can energy be transferred from one material to another? Science Essential Question

Science Essential Question What happens to a material when energy is transferred to it? Science Essential Question

E N E R G Y F O O D QUESTION? What do we need to move? Where do we get this energy from? F O O D

In fact ….. NOTHING would happen without ENERGY

What is Energy?? Energy is the ability to do work. Everything that happens in the world uses energy! Most of the time we can’t see energy, but it is everywhere around us!! Energy causes changes.

Energy Video Clip

2. Potential There are two different types of energy and they are: 1. Kinetic 2. Potential Energy can be transferred from potential to kinetic and between objects.

Kinetic Energy Kinetic Energy is energy that is in motion. It is energy possessed by an object due to its’ motion or movement. As long as an object is moving at the same velocity, it will maintain the same kinetic energy. The heavier a thing is, and the faster it moves, the more kinetic energy it has. Examples: moving water wind

Potential Energy Potential Energy is the stored energy. Potential simply means the energy has the ability to do something useful later on. As a moving object slows down, its potential energy increases. As the object speeds up, its potential energy decreases. Examples: a book held over your head a bicycle on top of a hill a stretched rubber band

Energy Activity #1 Stand behind your desk with feet apart and arms above your head in a V position. Now, as I tell you do 2 jumping jacks – (bring your feet together and arms down to your side and go back to your original position. When you are standing that is potential energy waiting to be converted to kinetic energy. As you are doing the jumping jack that is kinetic energy.

Energy Activity #2 Hold the rubber band tightly and stretch it almost as tightly as possible. Let go of the rubber band -- pointing it at the wall and not at each other. The stretched rubber band exemplifies potential energy, which you can feel in the tension as the rubber band pulls against your hand. After you let go of the rubber band, that movement in the rubber band demonstrates potential energy being converted to kinetic energy. Give each student a rubber band. Go over the rules of rubber band. Explain that the stretched rubber band exemplifies potential energy, which they can feel in the tension as the rubber band pulls against their hands. After they let go of the rubber band, Explain that movement in the rubber band demonstrates potential energy being converted to kinetic energy

Video - Potential and Kinetic Energy http://www.teachertube.com/video/ story-of-kinetic-and-potential-energy- 127812

A Song to Practice

Draw this picture in your science notebook.

Kinetic and Potential Energy Foldable Complete the Kinetic and Potential Energy Foldable activity.

Energy Quiz Put your name on a sheet of notebook paper. The following slides have questions about kinetic and potential energy. Number your paper 1-7 Answer the questions as I present the slides.

1. Which of the following has the most potential energy? A. A car at the top of a hill B. A car speeding down the hill C. A person at the top of the hill Correct Answer: A

2. Kinetic and potential energy both relate to: A. Heat B. Light C. Motion Correct Answer: C. motion

3. What is potential energy? A. The energy an object has due to its motion B. The stored energy of an object due to its position or condition C. The energy an object might have if it existed Correct Answer: B. the stored energy of an object due to its position or condition

4. What is kinetic energy? A. The energy an object has due to its motion B. The stored energy of an object due to its position or condition C. The energy an object might have if it existed Correct Answer: the energy an object has due to its motion

5. What is an example of kinetic energy at work? A. A ball lodged in a tree B. A Frisbee flying through the air C. A car in the garage Correct answer: a Frisbee flying through the air

6. Can you create or destroy energy? A. Yes B. No C. Only if you are a really big wrestler

7. What has the least kinetic energy? A. A car B. A satellite orbiting in space C. An object that is not moving Correct answer: C - an object that is not moving