INITIAL ACTIVITY: WHICH ITEM HAS MORE POTENTIAL ENERGY AND WHY? 1. A BOOK SITTING ON YOUR DESK 2. A BOOK SITTING ON THE ROOF 3. A BOWLING BALL SITTING.

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Presentation transcript:

INITIAL ACTIVITY: WHICH ITEM HAS MORE POTENTIAL ENERGY AND WHY? 1. A BOOK SITTING ON YOUR DESK 2. A BOOK SITTING ON THE ROOF 3. A BOWLING BALL SITTING ON THE FLOOR 4. A BOWLING BALL SITTING ON THE ROOF Objective (SWBAT): Describe How Energy Transforms. ** TAKE OUT HW**

Law of Conservation of Energy Energy can never be created or destroyed. Energy can only be transferred to another object or change form. TOTAL AMOUNT OF ENERGY NEVER CHANGES!

Changing Kinetic and Potential Energy As an object rises or falls, kinetic and potential energy are transformed into each other. The TOTAL amount of energy does not change! As one increases, the other decreases and vice versa.

Changing Forms of Energy When energy is “being used” it is really just changing form. Most machines as well as living things turn one type of energy into another. Example: Chemical Energy is transformed into kinetic energy in your body. Without it, you wouldn’t be able to move! A car uses chemical energy (gasoline) and changes it to kinetic energy (motion)

Generating Electrical Energy A GENERATOR is a machine that converts kinetic energy to electrical energy. Burning fossil fuels produces thermal (heat) energy. In power plants, steam is used to spin a turbine which spins the generator providing electricity.

Self Check (Answer in Notebooks) 1. What does a generator do? 2. Plants make food through photosynthesis using the light from the sun. What energy transformation do you think is happening? Why?