Energy

Question 1

Name some non-renewable energy sources

Answer 1

Oil
Coal
Gas
Nuclear

Question 2

What is the difference between a renewable and non-renewable energy source?

Answer 2

Renewable Energy Source - Can be replenished indefinetly
Non-Renewable Energy Source - Cannot be replenished indefinetly - will eventually run out.

Question 3

Advantages and disadvantages of electric cars over petrol/diesel

Answer 3

Advantages
- No greenhouse gas emissions
- Saves money on the cost of fuel
- Higher acceleration rate
Disadvantages
- More expensive
- Safety hazard - are dangerous because they aren’t very loud
- Spends a long time charging

Question 4

Describe how nuclear fission is different from nuclear fusion.

Answer 4

Fission - the splitting of a nucleus.
Fusion - the joining of nuclei.

Question 5

The UK Government has proposed to decarbonise the power sector by 2025. Describe what is meant by the ‘decarbonisation’ of the power sector.
Explain what this means.

Answer 5

• Decarbonisation means reducing fossil fuel-based power stations (1)
• This also leads to preventing carbon-based emissions.
• It also means to embed more carbon capture and storage [CCS] in electricity generation
• The aim is for emissions to reach ‘net zero’ by 2050
• increase the amount of renewable energy sources for electrical generation.

Question 6

Explain how electricity is generated in a fossil fuel power station.

Answer 6

Fossil fuel is burnt. (1)
Water is heated and turns to steam. (1)
Steam turns a turbine. (1)
Turbine turns a generator. (1)

Question 7

Explain the particle motion in a gas.

Answer 7

Particles move at random speeds (1)
Particles move in random directions (1)
Weak forces between the particles (1)
No fixed shape of gas(1)