Student Objective Warm Up To explain how energy transformations produce electricity To examine the energy source use in the United States Warm Up When a toaster is working it is transforming what energy into what energy?

BIG Question Here are two electrical energy devices - Energy Transformations and Conservation BIG Question Here are two electrical energy devices transforming energy. But where do these devices get the electrical energy? (Discuss)

Electrical Energy - Unique Electrical energy is unique from the other energy sources because it is a secondary source of energy. That means it must be “produced” or generated by another energy source. On the next slide you will begin a web exploration to answer these questions: What are the other energy sources? What energy sources are used to generate electricity?

Energy Sources Web Exploration First let’s watch a BrainPOP on energy sources. http://www.brainpop.com/science/energy/energysources/ Using the web-link below complete the “Energy Sources Exploration” http://tonto.eia.doe.gov/kids/energy.cfm?page=2 3. Finish worksheet using textbook pgs. 166-169. Energy Exploration Worksheet goes with this activity.

AFTER you are finished ALL of the Energy Sources Exploration worksheet, check your answers on the next TWO slides.

a. Renewable - they are replenished in a short time. Energy Sources 1. What are the nine energy sources used in the United States? __________________________________________________________________________________________________________________ 2. What are the two main categories of energy sources? Explain each. ____________________________________________________ 3. What makes electricity different from other sources of energy? __________________________________________________________________________________________________________________ 5. What two sources are used the most in the United States? _________________________________________________________ 6. What category of fuel are these two sources in? _________________________________________________________ 7. What type of energy source are these 2 sources? ________________ Biomass, hydropower, geothermal, wind, solar, petroleum (oil), natural gas, coal, & uranium (nuclear) a. Renewable - they are replenished in a short time. a. Nonrenewable - supplies are limited It is a secondary source of energy, it must be generated from other energy sources. coal & natural gas Fossil fuels Nonrenewable GO ON

Fossil Fuels – coal, petroleum (oil), & natural gas Scan pages 166-169 in textbook and answer these two questions: Where did the energy in fossil fuels come from? How is the energy in fossil fuels released? A fossil fuel’s energy comes from the sun and is stored in the plants & animals that converted the sun’s energy into chemical energy. A fossil fuel’s chemical energy is released when it is burned.

Energy Sources Web Exploration Look at these pie charts of the energy sources in the United States for 2007 & 2011 & compare with the graphic on your worksheet. How have our energy sources changed?

BGE