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