1. Generating Electricity World Electricity Generation LG: to compare different methods of electricity generation

2. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy LG: to compare different methods of electricity generation

3. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. hydroelectric generation Turbine: a fan-like device which turns in response to the pressure of falling water LG: to compare different methods of electricity generation

4. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. hydroelectric generation Generator: a coil of wire turned inside a magnet generates electricity LG: to compare different methods of electricity generation

5. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. hydroelectric generation Power lines: electricity generated is carried in wires over long distances to our homes LG: to compare different methods of electricity generation

6. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. tidal generation -high & low tides occurtwice daily -tidal water movementcan be used to turn a turbine LG: to compare different methods of electricity generation

7. Generating Electricity LG: to compare different methods of electricity generation

8. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. thermal generation -water is heated to make steam -pressure builds & the steam can only escape by passing through a turbine -this turns the turbine LG: to compare different methods of electricity generation

9. Generating Electricity LG: to compare different methods of electricity generation

10. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. thermal generation Fossil Fuel: burning coal, oil, or natural gas can be used to heat the water LG: to compare different methods of electricity generation

11. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. thermal generation Fossil Fuel: burning coal, oil, or natural gas can be used to heat the water Radioactive Material: when the nuclei of uranium atoms break apart huge amounts of energy is released, which can be used to heat the water LG: to compare different methods of electricity generation

12. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. thermal generation Fossil Fuel: burning coal, oil, or natural gas can be used to heat the water Radioactive Material: when the nuclei of uranium atoms break apart huge amounts of energy is released, which can be used to heat the water Biomass: biodegradable wastes can be burned to heat the water LG: to compare different methods of electricity generation

13. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. Wind -the blades themselves act as a turbine to turn the middle of the generator to produce electricity called wind turbines, not wind mills wind turbine video LG: to compare different methods of electricity generation

14. Generating Electricity Electricity Generation: electrical energy has to be made by conversion from some other form of energy e.g. Light photovoltaic cells: converts light directly into electrical energy LG: to compare different methods of electricity generation

15. Generating Electricity Now it's your turn: Activity 12.8 pp 536 – 537 LG: to compare different methods of electricity generation