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 occur twice daily
-tidal water movement can 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