Across
- 2. poisons, materials, wastes, gases
- 4. a substance used in or produced by a chemical process
- 7. something that could be bought or sold
- 8. cycle the process by which water on the earth evaporates
- 10. particles of earth,clay,or sand that eventually settle water.
- 11. having to do with the sea; living in or caused by the sea.
- 14. to make something dirty, polluted or unusable
- 15. a natural environment of a living thing
- 17. a waste substance that makes air or water unhealthy
Down
- 1. blooms organisms that live mainly in the water and make their food through photosynthesis.
- 3. everything that surrounds a particular type of living thing
- 5. a substance that can kill unwanted plants
- 6. water or waste materials
- 9. harm, loss, ruin, tragic
- 12. a small amount of something or piece of something
- 13. to interrupt or interfere
- 16. a natural substance added to dirt to make it better for growing plants