Quick answer: Energy resources are non-renewable (coal, oil, natural gas, uranium) or renewable (solar, wind, hydro, tidal, geothermal, biomass). This grade 8 science test on energy resources has 8 questions worth 20 marks, to do in 45 minutes: renewable resources, power station Sankey diagram and burning coal and the climate. The mark scheme is on a separate page; free printable PDF.
This test covers energy resources, power stations, efficiency, energy calculations and climate change. Answer all the questions, show your working for calculations and include units.
Level: Grade 8 science (Year 9 · Class 8) · Curriculum: MS-ESS3-3
Question 1 Renewable resources (2 marks)
- State what is meant by a renewable energy resource. (1 mark)
- Give one example. (1 mark)
Question 2 Power station Sankey diagram (3 marks)
The Sankey diagram shows a power station with an input of 200 MJ and a useful output of 70 MJ.- Calculate the wasted energy. (1 mark)
- Calculate the efficiency as a percentage. (2 marks)
Question 3 Burning coal and the climate (3 marks)
Explain how burning coal in power stations contributes to global warming. (3 marks)Question 4 Nuclear power (2 marks)
- State one advantage of nuclear power over coal. (1 mark)
- State one disadvantage of nuclear power. (1 mark)
Question 5 Solar farm energy (3 marks)
A solar farm delivers 4.0 MW for 6.0 hours.- Calculate the energy delivered in MWh. (2 marks)
- Convert your answer to kWh. (1 mark)
Question 6 Reliability of wind power (2 marks)
Explain why a country cannot rely on wind power alone, and suggest one way to solve the problem. (2 marks)Question 7 Hydroelectric energy (3 marks)
Water of mass 2.0 × 10⁴ kg falls through a height of 50 m. Use g = 9.8 N/kg. Calculate the gravitational potential energy lost by the water. (3 marks)Question 8 Reducing emissions (2 marks)
Suggest two ways a family can reduce the CO₂ emissions linked to its energy use. (2 marks)
