P3 Science Revision Notes!

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Mind Map on P3 Science Revision Notes!, created by z10c.bc on 04/25/2014.

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z10c.bc
Created by z10c.bc over 5 years ago
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P3 Science Revision Notes!
1 Primary energy sources
1.1 Fossil fuels
1.2 nuclear fuels
1.3 biofuels
1.4 Wind
1.5 Waves
1.6 Radiation from the sun
2 Secondary energy sources are produced from primary energy sources. Electricity is a secondary energy source because it is generated from primary energy sources
3 Power is measured in Watts (W)
4 Time is measure is Seconds (s)
5 Energy is measured in Joules (J)
6 Electricity is powered in Volts (V)
7 Current is measured in Amps (A)
8 Power (W) = Volts (V) x Current (A)
9 A sankey diagramn shows how energy supplied to a device is transferred into different forms of energy
10 100J is input
10.1 90J is lost
10.2 10J is used
11 Efficiency = energy usefully transferred ÷ total energy supplied
12 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.
13 Waste from power stations are radioactive. They pose a serious health risk
14 Renewable energy sources
14.1 Wind Turbines
14.1.1 Rely on the weather
14.2 Hydroelectric Schemes
14.2.1 Need suitable sites
14.3 Wave Technology
14.3.1 Rely on the weather