Energy resources and energy transfers — IGCSE Physics (Edexcel)
About Course
4 Energy resources and energy transfers
The following sub-topics are covered in this section.
(a) Units
(b) Energy transfers
(c) Work and power
(d) Energy resources and electricity generation
(a) Units
4.1 use the following units: kilogram (kg), joule (J), metre (m), metre/second (m/s),
metre/second2 (m/s2), newton (N), second (s) and watt (W)
(b) Energy transfers
4.2 describe energy transfers involving energy stores:
• energy stores: chemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic, nuclear
• energy transfers: mechanically, electrically, by heating, by radiation(light and sound)
4.3 use the principle of conservation of energy
4.4 know and use the relationship between efficiency, useful energy output and total energy output:
4.5 describe a variety of everyday and scientific devices and situations, explaining the transfer of the input energy in terms of the above relationship, including their representation by Sankey diagrams
4.6 describe how thermal energy transfer may take place by conduction, convection and radiation
4.7 explain the role of convection in everyday phenomena
4.8 explain how emission and absorption of radiation are related to surface and temperature
4.9 practical: investigate thermal energy transfer by conduction, convection and radiation
4.10 explain ways of reducing unwanted energy transfer, such as insulation
(c) Work and power
4.11 know and use the relationship between work done, force and distance moved in the direction of the force:
work done = force × distance moved
W = F × d
4.12 know that work done is equal to energy transferred
4.13 know and use the relationship between gravitational potential energy, mass, gravitational field strength and height:
gravitational potential energy = mass × gravitational field strength × height
GPE = m × g × h
4.14 know and use the relationship:
kinetic energy = 1/2 × mass × speed2
KE = 1/2× m× v2
4.15 understand how conservation of energy produces a link between gravitational potential energy, kinetic energy and work
4.16 describe power as the rate of transfer of energy or the rate of doing work
4.17 use the relationship between power, work done (energy transferred) and time taken:
Power = Work done / time
P = W/ t
(d) Energy resources and electricity generation
4.18P describe the energy transfers involved in generating electricity using:
• wind
• water
• geothermal resources
• solar heating systems
• solar cells
• fossil fuels
• nuclear power
4.19P describe the advantages and disadvantages of methods of large-scale electricity production from various renewable and non-renewable resources
Course Content
4.1: units
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4.1: Units
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Quiz 4.1
Energy Transfer–4.2: Discuss different energy stores
Energy Transfer–4.3 use the principle of conservation of energy
Energy Transfer–4.4: know and use the relationship between efficiency, useful energy output and total energy output:
Energy Transfer–4.5: Describe a variety of everyday and scientific devices and situations, explaining the transfer of the input energy in terms of the above relationship, including their representation by Sankey diagrams
Energy Transfer–4.6: describe how thermal energy transfer may take place by conduction, convection and radiation
Energy Transfer–4.7:explain the role of convection in everyday phenomena
Energy Transfer–4.8: explain how emission and absorption of radiation are related to surface and temperature
Energy Transfer–4.9: practical: investigate thermal energy transfer by conduction, convection and radiation
Energy Transfer–4.10: explain ways of reducing unwanted energy transfer, such as insulation
Energy & Power–4.11: know and use the relationship between work done, force and distance moved in the direction of the force: work done = force × distance moved W = F × d
Work done–4.12 know that work done is equal to energy transferred
work done–4.13: work done as gravitational potential energy
work done–4.14: work done as kinetic energy
work done–4.15: understand how conservation of energy produces a link between gravitational potential energy, kinetic energy and work
work done–4.16: describe power as the rate of transfer of energy or the rate of doing work
work done–4.17: use power formula
Energy resources and electricity generation–4.18: describe the energy transfers involved in generating electricity using different sources of energies
4.19P describe the advantages and disadvantages of methods of large-scale electricity production from various renewable and non-renewable resources
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