Across
- 4. water that flows over land and collects in a stream or river
- 6. fresh water found below Earth’s surface
- 8. relatively pure water; water with few dissolved salts
- 10. (2 words) an area where surface water soaks into the ground and reaches an aquifer
- 13. water that has been used in households, businesses, industries, or public facilities and drained or flushed down the pipes, as well as polluted runoff from streets and storm drains
- 15. (2 words) the rapid growth of algae in an area that can cover the surface of the water and block sunlight from reaching plants below
- 16. (2 words) a network of connected streams and rivers
- 19. (2 words) a harmful algal bloom caused by algae that produce reddish pigments
- 22. having spaces or pores that allow water or other substances to pass through
- 23. (2 words) type of pollution that comes from many places over a large area
- 24. an artificial lake where water for human use is stored
- 25. landscaping using plants adapted to dry conditions
- 26. the buildup of salts in the surface layers of soil
Down
- 1. (2-words) the boundary between the zone of aeration and the zone of saturation in an aquifer
- 2. not allowing water or other substances to pass through
- 3. a spongelike formation of rock, sand, or gravel that holds water
- 5. (2 words) a method of wastewater disposal
- 7. (2 words) fresh water found on Earth’s surface
- 9. all of the land area that supplies water to a particular river system
- 11. a disease-causing organism
- 12. a channel dug into an aquifer to reach groundwater
- 14. (2 words) the pollution of a body of water as a result of human activity; also called artificial eutrophication
- 17. (2 words) type of pollution that comes from a specific location (factory or sewer pipe are examples)
- 18. (2 words) the process of moving water from its source to places where humans can use it (e.g., homes and farms).
- 20. an obstruction placed in a river or stream to block its flow
- 21. the process of removing salt from seawater; also called desalinization
