Level: JHS, Basic 7 | Subject: Integrated Science | Strand: Forces and Energy | Topic: Electricity Generation and Its Effects on the Environment
Read the summary notes first, then try these questions. Go back to the summary notes for this topic.
Part A has 20 tick-box questions. Part B has 5 essay questions with a marking guide at the bottom.
Test Yourself: 20 Objective Questions
Tick one answer for each question, then press Review answer. If your answer is wrong, it will be marked first, then the correct answer will show in green.
1. Most electricity is produced by a device called a
2. In a power station, a turbine is used to
3. The Akosombo Dam produces electricity from
4. Which of these is a hydroelectric station in Ghana?
5. The Takoradi and Aboadze power plants mainly use
6. Which of these is a renewable source of energy?
7. Which of these is a non-renewable source of energy?
8. Solar panels change
9. Wind farms produce electricity when
10. A problem with building a big hydroelectric dam is that it
11. Burning fuel in thermal power stations mainly causes
12. The gas released when fuel is burnt which adds to global warming is
13. Which source of electricity does NOT release smoke when generating power?
14. A hydroelectric station may produce less power when
15. Nuclear power stations create a danger because of
16. A good way to save electricity at home is to
17. Energy-saving LED bulbs help us to
18. Electricity from burning waste from plants and animals is called
19. Which is an advantage of solar energy?
20. Which of these should we do to protect electric power lines?
Essay Questions
- (a) How is electricity generated in a hydroelectric station? (b) Name two hydroelectric stations in Ghana. (5 marks)
- Distinguish between renewable and non-renewable sources of energy, giving two examples of each. (6 marks)
- State four effects of generating electricity by burning fuel on the environment. (4 marks)
- Give three problems caused by building a big hydroelectric dam. (3 marks)
- Suggest five ways in which a household can save electricity. (5 marks)
Essay Questions: Marking Guide for Teachers and Parents
- (a) Water from a dam falls and turns a turbine (1). The turbine turns a generator (1). The generator produces electricity (1). (b) Akosombo and Bui (1 mark each, total 2).
- Renewable sources do not run out, e.g. sun, wind, water (3). Non-renewable sources can finish, e.g. coal, oil, gas (3).
- Any four: air pollution, global warming, acid rain, health problems such as breathing difficulties, smoke damage to plants (1 mark each).
- Any three: floods land, destroys farms and forests, moves people from villages, changes river life, spread of water-borne diseases (1 mark each).
- Any five: switch off lights, use LED bulbs, unplug unused appliances, iron clothes in batches, use solar power, do not leave TV on (1 mark each).
Education Always (education.inspiringalways.com). Original practice questions, not official WAEC or BECE questions.