Across
- 3. Energy generated by the movement of ocean tides
- 5. A fossil fuel formed from ancient plant material
- 7. A form of energy carried by moving electrons
- 8. A device that converts motion into electrical energy
- 11. Organic material used as a fuel source
- 14. Fuel formed from the remains of ancient plants and animals
- 15. The ability to do work or cause change
- 16. The protection and careful use of resources
- 19. A radioactive element used in nuclear power stations
- 22. A barrier built across a river to store water
- 24. The natural world around us
- 27. Another name for crude oil
- 29. An energy source that cannot be replaced quickly once used
- 30. A fossil fuel made mostly of methane
Down
- 1. Able to continue without depleting resources
- 2. Energy produced by ocean surface movements
- 4. Harmful substances released into the environment
- 6. A fuel commonly used in trucks and machinery
- 9. An energy source that can be naturally replaced over time
- 10. A fossil fuel often used for heating and cooking
- 12. Light and heat received from the Sun
- 13. Energy produced from moving water
- 17. A liquid fossil fuel extracted from underground
- 18. Energy that comes from the Sun
- 20. A gas or substance released into the atmosphere
- 21. Energy that comes from heat inside the Earth
- 23. Moving air that can be used to generate electricity
- 25. Energy produced from reactions in atomic nuclei
- 26. A machine with blades that spins to generate electricity
- 28. The process of extracting resources from the Earth