Sources of Energy (Conventional & Non-Conventional)

Grade 9 Science — Sources of Energy (Conventional & Non-Conventional): 25 practice questions with instant scoring and explanations.

1. Which of the following is a non-renewable source of energy?
2. Thermal power plants generate electricity by burning which fuel?
3. In hydroelectric power plants, water potential energy is converted to:
4. Which renewable energy source depends on tidal forces of the Moon?
5. Solar cells convert solar energy directly into:
6. Geothermal energy is harnessed from:
7. Which process is used in a nuclear fission power plant?
8. What is the main disadvantage of fossil fuels?
9. Wind energy farms typically have turbines with large:
10. Biomass energy is obtained from:
11. Which country is a world leader in wind energy production?
12. Nuclear fusion involves:
13. If a coal power plant operates at 30% efficiency, how much energy is wasted as heat? (Efficiency = useful energy out / total energy in)
14. Which renewable energy source is most reliable and consistent?
15. The primary greenhouse gas emitted by burning coal is:
16. What is the main advantage of tidal energy over wind energy?
17. In a thermal power plant, heat from fuel is used to boil water. What does the steam drive?
18. Which of the following is NOT an advantage of solar energy?
19. Biogas is primarily composed of:
20. A hydroelectric dam stores water at height h. The gravitational potential energy is mgh. If h increases, how does the potential energy change?
21. Which energy source contributes most to global greenhouse gas emissions?
22. The efficiency of a nuclear power plant is approximately:
23. Compressed Natural Gas (CNG) is used as a fuel because it:
24. Wind turbines generate more electricity when:
25. Which type of energy is harnesses from the decay of radioactive elements?