What you'll learn
Energy resources and how electricity reaches homes.
Energy resources
- Renewable (wind, solar, hydro, tidal, geothermal) vs non-renewable (fossil fuels, nuclear); advantages and disadvantages.
The National Grid
- Transformers step voltage up for transmission (reducing losses) and down for homes.
Exam tips
- Give balanced pros and cons of each resource.
- Explain why high-voltage transmission reduces energy loss.
Common mistakes
- Calling nuclear renewable.
- Confusing step-up and step-down transformers.