Across
- 3. the key component of solar cells that convert sunlight into electricity.
- 6. energy sources with minimal environmental impact.
- 9. the process by which solar cells convert sunlight into electricity.
- 11. heat from the Earth's core harnessed for power generation.
- 14. a fuel made from vegetable oils or animal fats.
- 15. a methane-rich gas produced through the decomposition of organic matter.
- 16. the vast availability of renewable energy resources.
- 17. sources that replace fossil fuels and reduce pollution.
- 19. the primary source of energy driving most renewable systems.
- 20. a way of collecting energy from the sun and turning it into electricity.
Down
- 1. endless natural energy sources unlike fossil fuels.
- 2. a natural source of energy captured by spinning turbines.
- 4. a device that converts wind or water power into electricity.
- 5. used to concentrate sunlight for heating or energy generation.
- 7. liquid or gas fuels derived from organic matter.
- 8. the driving force behind hydroelectric dams and water mills.
- 10. the individual units that make up a solar panel.
- 12. a large structure that harnesses the flow of water for power.
- 13. organic matter burned or converted into biogas or fuel.
- 18. an alcohol-based fuel produced from fermented crops.