ENERGY

1. ENERGY

2. Warm-Up Question What have you done today that required energy?

3. A Brief History of Energy • How has energy use changed over time?

4. A Brief History of Energy • How has energy use changed over time?

5. A Brief History of Energy • How has energy use changed over time?

6. A Brief History of Energy • How has energy use changed over time?

7. A Brief History of Energy • How has energy use changed over time?

8. A Brief History of Energy • How has energy use changed over time?

9. A Brief History of Energy • How has energy use changed over time?

10. A Brief History of Energy • How has energy use changed over time?

11. A Brief History of Energy • How has energy use changed over time?

12. Changes in U.S. Energy Use

13. 1973 • In response to the United States’ support of Israel in the Yom Kippur War, OPEC placed an embargo on the U.S. • Prices of oil skyrocket

15. Measuring Energy • Are all energy sources measured in the same way? • Gallons of gasoline • Cords of wood • Cubic feet of natural gas • How do we measure the amount of energy if each source has its own unit of measure?

16. British Thermal Units • 1 Btu = amount of energy needed to raise the temperature of 1 lb. of water by 1 degree Fahrenheit • 1 wooden kitchen match = 1 Btu • 1 ounce of gasoline = 1,000 Btu’s

17. Btu’s • Everyday, the average American uses about 890,000 Btu’s of energy • In order to measure very large quantities of energy, we use the “quad”, which represents 1 quadrillion (1,000,000,000,000,000) Btu’s • The U.S. uses about 1 quad of energy every 3.7 days

18. U.S. Energy Sources • What percentage of our energy comes from: • Oil • Coal • Natural gas • Nuclear • Wind • Solar • Geothermal • Biomass • Hydro

19. Energy Sources

20. Source: Energy Information Agency

21. Energy Sources