Across
- 2. Water released from clouds in the form of rain, freezing rain, sleet, snow, or hail.
- 5. Table: The level below which the ground is saturated with water.
- 7. The process where plants absorb water through the roots and then give off water vapor through pores in their leaves.
- 8. Treatment: The second stage of sewage treatment that uses biological processes to catch the dissolved organic matter missed in primary treatment.
- 12. Disease-causing bacteria, viruses, and other microorganisms that can contaminate water supplies.
- 13. Pollution: The degradation of water quality by any process that changes ambient water temperature, typically from the use of water as a coolant by power plants and industrial manufacturers.
- 16. The process by which water vapor in the air is changed into liquid water.
- 18. Treatment: The first stage of sewage treatment where solids are allowed to settle and are removed from wastewater.
- 19. Pollution: Pollution resulting from many diffuse sources, such as runoff from agricultural fields or urban storm drains.
- 20. Pollution: The accumulation of fine particles of silt and clay in a water body, which can cloud the water and harm aquatic life.
- 22. The process of a substance in a liquid state changing to a gaseous state due to an increase in temperature or pressure.
- 24. A barrier constructed across a waterway to hold back water and raise its level.
- 25. A large natural or artificial lake used as a source of water supply. Types and Sources of Water Pollution
Down
- 1. The process driven by nutrient pollution that causes dense growth of plant life, leading to the death of animal life from lack of oxygen.
- 3. Pollution: Pollution that comes from a single, identifiable source, such as a discharge pipe from a factory.
- 4. Treatment: The final cleaning process that improves wastewater quality before it is reused, recycled, or discharged to the environment.
- 5. An area of land that drains all the streams and rainfall to a common outlet such as the outflow of a reservoir, mouth of a bay, or any point along a stream channel.
- 6. Treatment: The process of converting wastewater into an effluent that can be returned to the water cycle with minimum impact on the environment.
- 9. Water Act (1972): The primary federal law in the United States that established the basic structure for regulating discharges of pollutants into the waters of the United States and regulating quality standards for surface waters.
- 10. Pollution: The process where too many nutrients, mainly nitrogen and phosphorus, are added to bodies of water and act like fertilizer, causing excessive growth of algae.
- 11. Water held underground in the soil or in pores and crevices in rock.
- 14. A body of permeable rock which can contain or transmit groundwater.
- 15. The process of removing salt from seawater to make it drinkable.
- 17. Cycle: The continuous movement of water on, above, and below the surface of the Earth.
- 21. Drinking Water Act (1974): The main federal law that ensures the quality of Americans' drinking water, under which the EPA sets standards for drinking water quality.
- 23. Pollution: The contamination of water bodies, usually as a result of human activities.