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Energy resources
Explain how useful energy can be derived or electrical power can be produced from various sources, including: (a) chemical energy in fossil fuels (b) chemical energy in biofuels (c) water energy from waves, tides, and hydroelectric dams (d) geothermal energy (e) nuclear energy (f) solar energy for electricity generation (solar cells) (g) solar energy for heating water (solar panels) and wind energy, mentioning the roles of a boiler, turbine, and generator where applicable.
7
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70
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49
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90 min
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CambridgeIGCSEPhysicsMotion, forces and energy
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Energy resources outcomes7 objectives
- Explain how useful energy can be derived or electrical power can be produced from various sources, including: (a) chemical energy in fossil fuels (b) chemical energy in biofuels (c) water energy from waves, tides, and hydroelectric dams (d) geothermal energy (e) nuclear energy (f) solar energy for electricity generation (solar cells) (g) solar energy for heating water (solar panels) and wind energy, mentioning the roles of a boiler, turbine, and generator where applicable.
- Discuss the pros and cons of each energy generation method regarding their renewability, availability, reliability, scale, and environmental effects.
- Grasp the qualitative idea of energy transfer efficiency.
- Recognize that solar radiation is the primary energy source for all energy resources, except for geothermal, nuclear, and tidal energy.
- Acknowledge that energy is produced through nuclear fusion in the Sun.
- Be aware that research is ongoing to explore how energy from nuclear fusion can be harnessed for large-scale electrical energy production.
- Define efficiency using the formulas: (a) useful energy output × (%) efficiency = (100%) total energy input (b) useful power output × (%) efficiency = (100%) total power input, and be able to recall and apply these equations.
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