Across
- 1. Wind turbines are put ____ up in the air to collect as much wind as possible
- 4. The center of the earth is hot _____
- 7. ______ are made from natural gas
- 9. Hydropower only creates ___________
- 10. Renewable energy produces no _____ house gases
- 13. Solar energy produces _____ energy
- 14. Hydropower comes from a ________ wheel
- 16. hydrogen fuel cells are very _________
- 18. hydrogen fuel cells can create ____
- 19. ___ is mainly used for transportation
- 22. _____ energy is made of hydrogen
- 23. Wind power gives ________ advantages
- 25. Uses wind ________ to generate electricity
- 28. Wind power causes ____ pollution
Down
- 2. __________ is renewable
- 3. Homes and Businesses use solar ______ for electricity
- 5. Biomass increases ______ warming
- 6. _____________ are compounds that are used for oil
- 7. Biomass can _______ the airline
- 8. __________ are factories where oil is separated
- 9. Capturing hydrogen fuel cells is very _________
- 11. Wind power means a lot of _____
- 12. _______ gets its energy from the sun
- 15. _______ is a mixture of gas and alcohol
- 17. Hydropower effects animals in a ________ way
- 20. Biomass threatens _______
- 21. Fossil fuels are ___ renewable
- 24. Hydropower is ____ to make
- 26. _____ fly into the wind turbines and die
- 27. You can't get solar energy during the _____