Across
- 3. zone an area where surface water, such as rainwater, infiltrates the ground and replenishes an aquifer
- 7. pollution the contamination of water bodies, with a negative impact on their uses
- 10. eutrophication the process where human activities, primarily the release of excess nutrients like nitrogen and phosphorus, cause an overgrowth of algae and aquatic plants in a body of water
- 13. the process of removing dissolved salts and other impurities from water
- 14. a land area that drains to a common point
- 15. safe to drink
- 16. source pollution comes from a single, identifiable source, such as a pipe or smokestack
- 18. point source pollution a widespread type of pollution
- 19. an underground layer of permeable rock, sand, or gravel that holds and transmits groundwater
Down
- 1. a place where a large supply of something is stored
- 2. the state or quality of a material or membrane that causes it to allow liquids or gases to pass through it.
- 4. pollution the degradation of water quality by human-caused changes to ambient water temperature
- 5. water that exists beneath the Earth's surface in underground spaces called aquifers
- 6. the increasing concentration of a substance, like a pollutant or heavy metal, in organisms at successively higher levels of a food chain
- 8. water any body of water on the Earth's surface
- 9. used water that has been negatively impacted in quality by human activities
- 11. system network of a main river
- 12. a bacterium, virus, or other microorganism that can cause disease.
- 17. a barrier built across a river to hold back water for purposes like power generation