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P3 Science Revision Notes!
- Primary energy sources
- Fossil fuels
- nuclear fuels
- biofuels
- Wind
- Waves
- Radiation from the sun
- Fossil fuels
- Secondary energy sources are produced from
primary energy sources. Electricity is a secondary
energy source because it is generated from primary
energy sources
- Power is measured in Watts (W)
- Time is measure is Seconds (s)
- Energy is measured in Joules (J)
- Electricity is powered in Volts (V)
- Current is measured in Amps (A)
- Power (W) = Volts (V) x Current (A)
- A sankey diagramn shows how energy
supplied to a device is transferred into
different forms of energy
- 100J is input
- 90J is lost
- 10J is used
- 90J is lost
- Efficiency = energy usefully transferred ÷ total energy supplied
- 1.fuel is burned to boil water to make
steam 2.steam makes a turbine spin
3.spinning turbine turns a generator
which produces electricity 4.electricity
goes to the transformers to produce
the correct voltage.
- Waste from power stations
are radioactive. They pose a
serious health risk
- Renewable energy sources
- Wind Turbines
- Rely on the weather
- Rely on the weather
- Hydroelectric Schemes
- Need suitable sites
- Need suitable sites
- Wave Technology
- Rely on the weather
- Rely on the weather
- Wind Turbines
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