Across
- 3. a structure built across a river to control the river’s flow
- 6. area of the Earth’s surface where water percolates down into the aquifer
- 8. sewage and fertilizer runoff
- 12. medium sized organisms
- 13. limestone ridges
- 14. a flowing network of water
- 15. the introduction of chemical, physical, or biological agents into water
- 16. fish
- 17. land under water
- 19. When the temperature of a body of water, such as a lake or stream, increases can result in this
- 20. the nutrient-rich zone near shore
- 21. An underground formation that contains groundwater
- 22. areas where rivers drop there load of mineral rich mud
Down
- 1. Water stored beneath the Earth’s surface
- 2. little organisms that get pushed by the tide
- 4. ability of rock or soil to allow water to flow
- 5. water that contains waste from homes or industry.
- 7. The area of land that is drained by a river
- 9. a method of providing plants with water
- 10. wastewater treatment plant,
- 11. pollution by like a road
- 18. created behind a dam