The Table shows the energy used from different resources in a country in four different years.
Table
| Year | Coal in TWh\text{TWh}TWh | Oil in TWh\text{TWh}TWh | Gas in TWh\text{TWh}TWh | Nuclear in TWh\text{TWh}TWh | Renewables in TWh\text{TWh}TWh |
|---|---|---|---|---|---|
| 1990 | 600 | 900 | 550 | 200 | 20 |
| 2000 | 450 | 880 | 1000 | 230 | 40 |
| 2010 | 380 | 800 | 1050 | 180 | 110 |
| 2020 | 60 | 650 | 880 | 160 | 330 |
Calculate the percentage decrease in the energy used from coal between 1990 and 2020.
Describe how the energy used from renewables changed between 1990 and 2020.
The total energy used by the country decreased between 2000 and 2020.
Suggest two reasons why.
A student says:
'The data shows that this country will use no fossil fuels by 2040.'
Evaluate the student's statement.
16 exam-style questions on OCR GCSE Physics 8.2 Powering Earth, covering 8.2.1 Renewable and non-renewable energy resources, 8.2.2 Patterns and trends in energy use, 8.2.3 The national grid, 8.2.4 Step-up and step-down transformers, 8.2.5 Efficiency of the national grid, 8.2.6 Transformers and power transmission at high voltage, 8.2.7 The UK domestic supply, 8.2.8 Direct and alternating potential difference, 8.2.9 Live, neutral and earth wires, and 8.2.10 Dangers of mains electricity. Each one has a worked solution and a mark scheme showing where the marks go.