EnergyTopic Summary
Knowledge Organiser: Energy Resources
Part of Energy Resources · GCSE GCSE Physics revision
This topic summary covers Knowledge Organiser: Energy Resources within Energy Resources for GCSE Physics. Revise Energy Resources in Energy for GCSE Physics with 15 exam-style questions and 12 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 13 of 13 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 13 of 13
Practice
15 questions
Recall
12 flashcards
Knowledge Organiser: Energy Resources
Key Terms
- Renewable: Replenishable; does not run out
- Non-renewable: Finite; will eventually run out
- Energy mix: Combination of sources used by a country
- Intermittent: Output varies; not always available
- Baseload: Continuous minimum power demand
- Geothermal: Heat from inside the Earth
- Biofuel: Fuel from organic material
Non-Renewable Sources
- Coal — high CO₂, reliable, cheap fuel
- Oil — mainly transport fuels
- Natural gas — lower CO₂, fast response
- Nuclear — no CO₂ (operation), radioactive waste
Renewable Sources (SHWGTB)
- Solar — light → electricity (intermittent)
- Hydroelectric — very reliable, habitat impact
- Wind — growing fast, intermittent
- Geothermal — reliable, limited locations
- Tidal — predictable, few sites
- Biofuel — continuous but CO₂ when burned
Evaluation Factors
- CO₂ emissions during operation
- Reliability / intermittency
- Land use and visual impact
- Construction and running costs
- Environmental damage (waste, habitat)
- Energy security (domestic vs imported)
Key Equations
- Efficiency = useful energy output ÷ total energy input (× 100%)
- Power (W) = energy (J) ÷ time (s)
- Energy (kWh) = power (kW) × time (h)
- Cost = energy (kWh) × price per kWh
Common Mistakes
- Calling nuclear renewable: Nuclear is non-renewable — it uses uranium which is a finite resource, even though it produces no CO₂ during operation
- Saying renewables are always better: Exam questions ask for balance — renewable sources can be intermittent, expensive, and have visual/habitat impacts
- Confusing reliable with renewable: Reliability means it works on demand (coal = reliable; wind = unreliable); renewable means the source replenishes naturally
- Missing the energy transformation chain: Questions often ask how energy is transformed — e.g. wind → kinetic → electrical via generator
- Forgetting CO₂ is produced during construction: Renewables have zero emissions during operation but do have carbon costs during manufacture and installation