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