Across
- 8. Collects as droplets on a cold surface when humid air
- 9. Affected by tides.
- 10. energy Natural resource
- 11. tanks A container for storing water
- 12. off Flows over the land surface
- 13. Evaporation from plants
- 14. Produced by the internal heat of the earth.
- 16. Natural movement of the air,
- 18. Sun energy
- 19. The work that a certain force (gravitational, electromagnetic, etc) can do.
- 20. A tube used to convey water, gas, oil, or other fluid substances.
Down
- 1. Scientist who studies organisms
- 2. Water that falls from the sky
- 3. Liquid into vapor
- 4. Found mainly in underground seams and used as fuel.
- 5. Water held underground in the soil
- 6. The process of removing salt from seawater.
- 7. energy Economic resource
- 15. Reusable resource or material
- 17. A barrier constructed to hold back water and raise its level