Across
- 2. a fuel from trees, backwards
- 4. Moving ___ turns a windmill
- 5. Which kind of food has the most energy?
- 7. The fuel that cars use
- 10. Made from trees from long ago
- 11. the source of most of our energy
- 13. moving water that can be used to produce electricity
- 14. fuel is burnt to release energy
- 17. All organisms __________ to release energy
- 20. Used to make biogas
- 21. Trees are cut into _________
- 22. Can turn a turbine to produce electricity
- 24. needed by plants to make food
- 27. platform for drilling oil wells at sea
Down
- 1. A fuel which rhymes with 'heat' and releases energy when burnt.
- 3. This is needed for burning fuels
- 5. Coal, oil and natural gas are all __________
- 6. Fuel made from sewage and dead organisms
- 8. Fuels supply _______
- 9. Energy from the sun, _____ energy
- 12. Burning gives off ______
- 15. Source of Wood
- 16. Moving air that can be used to produce electricity
- 18. Food substance found in leaves
- 19. these strike against the shore with a lot of energy
- 23. machine powered by wind
- 25. Another name for petroleum
- 26. Moving water can ______ a waterwheel