2. LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON TO GO BACK, PRESS ESC BUTTON TO END LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON TO GO BACK, PRESS ESC BUTTON TO END COMPUTER PRESENTATIONS FOR KS3 SCIENCE - PHYSICS ©2003, STEVE PARKER COMPUTER PRESENTATIONS FOR KS3 SCIENCE - PHYSICS ©2003, STEVE PARKER

3. 1 1 KS3 SCIENCE - PHYSICS KS3 SCIENCE - PHYSICS Energy Sources Energy Sources

4. SOURCES OF ENERGY 15

5. SOURCES OF ENERGY 16 One source of energy is the burning of fossil fuels (coal, oil and gas) One source of energy is the burning of fossil fuels (coal, oil and gas)

6. SOURCES OF ENERGY 17 But this source of energy cannot be renewed, and it produces several types of harmful emissions But this source of energy cannot be renewed, and it produces several types of harmful emissions

7. Carbon Dioxide from burning coal, oil and gas causes global warming. Sulphur dioxide from burning coal and oil causes acid rain.

8. SOURCES OF ENERGY 18 Nuclear energy would last a long time and is relatively clean, except that nuclear waste needs to be stored and is very dangerous Nuclear energy would last a long time and is relatively clean, except that nuclear waste needs to be stored and is very dangerous

9. SOURCES OF ENERGY 19 Hydro-electric, tidal and wind energy is both renewable and clean Hydro-electric, tidal and wind energy is both renewable and clean

10. SOURCES OF ENERGY 20 Solar power can provide both heating and electricity and is renewable and clean, while in some countries geothermal energy is found Solar power can provide both heating and electricity and is renewable and clean, while in some countries geothermal energy is found

11. Exercise: Renewable or Non-renewable? 1.Solar 2.Geothermal 3.Natural gas 4.Hydroelectric 5.Coal 6.Tidal 7.Wave 8.Uranium 9.Oil 10.Wind renewable non-renewable renewable non-renewable renewable non-renewable renewable

12. MethodAdvantagesDisadvantages Coal, oil and gas Nuclear Waves Wind Tides Solar Hydroelectric

13. All these methods affect the environment in some way!!! We need to choose!!