Across
- 3. wind is a _______ energy
- 6. the earth's core is this many miles below the surface
- 8. geothermal energy is mainly active in how many states?
- 14. used to obtain solar light
- 15. it hurts wildlife when these things are built
- 17. used to obtain solar heat
- 18. this is how we get magma
- 20. using biomass fuels may reduce these types of gases
- 22. this is one of the things that can be used to make hydropower energy
- 23. geothermal energy is from this part of the earth
- 24. hydrogen is very _______
- 25. hydropower is a _____ energy source
- 26. hydrogen is lighter than this
- 27. is an ________ ________
Down
- 1. there are tons to wind mills on these big plots of land
- 2. wind ____ turn wind into usable energy
- 4. this is one of the things burned to obtain biomass energy
- 5. hydropower is currently the ________ ______
- 7. hydropower is not yet used for ______________
- 8. biomass energy gives off less energy that these types of natural gases
- 9. the earth won't have wind without this "star"
- 10. this type of pollution is emitted when using biomass fuels
- 11. biomass ____
- 12. solar energy is good for this
- 13. solar energy is only available during this time
- 16. something wind doesn't create
- 19. geothermal energy creates this kind of heat
- 21. solar panels and collectors can be this
- 28. hydrogen atoms plus these kinds of atoms equals hydrogen elctricity