Across
- 1. energy released during nuclear fission
- 4. change
- 9. share
- 11. solar cells
- 12. resource that takes million years to be replaced
- 15. heat energy within the earth
- 17. gathering
- 18. minable
Down
- 2. resource that renews itself
- 3. electricity made from water
- 5. remains of living organisms
- 6. energy from sun
- 7. power generators for electricity
- 8. biofuels
- 10. windmill
- 13. gas flows up through pipes
- 14. a liquid mixture of hydrocarbons
- 16. energy obtained from tides