Across
- 1. an underground tank that holds household sewage.
- 3. pollution that originates from a broad area,
- 6. large area that cleans and disperses wastewater from a septic tank
- 7. harmful chemicals or waste that can pollute water.
- 12. direct transfer of water from leaves or plants to the atmosphere.
- 15. the water _____ is the continuous circulation of water in systems throughout the planet.
- 16. the mechanical process that removes particles from water when water moves through sand or dirt.
- 18. lakes, rivers, creeks, swamps,and springs are examples of ____________.
- 19. a scientist that studies water and the water systems of earth is called a _____-logist.
- 20. rain that is more acidic than normal rainfall is called ____ rain.
- 21. anything flushed down a toilet our poured down a drain.
- 22. the process where water seeps into the ground to refill an aquifer.
Down
- 2. warm water vapor mixes with cooler air to form ____________.
- 4. water that falls to earth as rain, snow, or hail.
- 5. contamination of water or air by harmful chemicals or waste materials.
- 8. the process of changing water from a liquid to a gas or vapor.
- 9. substances that promote plant growth.
- 10. land area that water runs off of to a single place like a river.
- 11. a layer of underground rock or sand which stores and carries water.
- 13. pollution at a single place is called _____ pollution.
- 14. a chemical used to destroy a pest such as an insect.
- 17. water found below the earth's surface.