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Paper 1 - Final Exams - Coggle Diagram
Paper 1 - Final Exams
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L2 - Half Life
Hal life is defined as the time taken for the number of unstable nuclei within a radioactive sample to half or the time taken for the radioactivity of a sample to half.
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L2 - Energy Resources
Energy Resources:
- Fossil fuels - Produces CO2 and SO2.
- Nuclear - No harmful polluting gasses produced, storing nuclear waste is expensive.
- Biofuels - Renewable, release greenhouse gasses when burned.
- Wind - No harmful polluting gasses, visual pollution, not very reliable.
- Wave - Renewable, no harmful polluting gasses, difficult to scale up, can destroy habitats.
- Hydroelectric - Renewable, reliable, difficult to scale up, potential to flood farmland.
- Geothermal - Renewable, no fuel costs, not suitable in all areas.
- Solar - Renewable, no fuel costs, inefficient and expensive, ineffective at night.
L3 - Reducing Heat Loss
In a house, heat is lost via convection, conduction and radiation. This can be reduced through the use of double glazing, cavity wall insulation and loft insulation.
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L2 - Static Electricity
A charged object creates an electric field around itself; electric field lines have a direction equal to the direction that a positive charge would experience within the field.
L1 - Changes in State
A plateau will be seen on a cooling curve, this occurs during a state change when the energy supplied to the system is increasing the internal energy through an increase in the substance's potential energy (governed by the placement of molecules) rather than the kinetic store (heat).
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