Across
- 4. The elimination of waste products from an organism
- 6. The use of water for growing crops
- 7. The process in which liquid water becomes water vapor
- 8. Water vapor (rain, snow etc.) that condenses and falls to earth
- 12. The process of inhalation and exhalation
- 13. The process in which water on the ground enters the soil
- 15. Water that is found underground
- 16. The process by which snow or ice changes directly to water vapor
- 17. Water from rain or snow that flows from the ground into streams
Down
- 1. A severe water shortage
- 2. An artificial or natural lake where water is collected as a water supply
- 3. Extremely dry
- 5. Preserving and using water wisely
- 8. Things that dirty the air or water
- 9. The process in which water vapor changes to liquid water
- 10. Evaporation of water from plant leaves
- 11. The study of water
- 14. Water that is continually being recycled and refreshed
- 16. Water found in rivers and lakes