Across
- 3. A biological community of interacting organisms and their physical environment)
- 4. Avoiding depletion of natural resources to maintain ecological balance)
- 6. A series of events that are regularly repeated in the same order)
- 8. Process of removing salt from seawater
- 10. Contamination of water bodies
- 12. The process of water turning into vapor
- 14. A large mass of moving ice and snow on land
- 17. The process by which water vapor becomes liquid)
- 18. Process by which moisture is carried through plants from roots to small pores on the underside of leaves)
- 20. Rain, snow, sleet, or hail that falls to the ground)
Down
- 1. The variety of life in the world or in a particular habitat)
- 2. The process of water turning into ice
- 5. Water held underground in the soil or in pores and crevices in rock)
- 7. Process by which water changes from a liquid into an atmospheric gas)
- 9. A substance that dissolves another to form a solution)
- 11. A gas that combines with oxygen to form water
- 13. Essential gas that combines with hydrogen to make water)
- 15. The weather conditions prevailing in an area in general)
- 16. Insufficient supply of something
- 19. An underground layer of water-bearing rock