Across
- 3. the act of polluting
- 4. a lack of something you need or want
- 6. forming an essential part of something and needed to make it complete
- 8. the top layer or outside part of something
- 10. to get rid of something that is not wanted or needed
- 12. continuous or regular over a long period of time
- 15. something you cannot explain
- 17. a period of ten years
- 18. the yellow stems of dried crops such as wheat
- 19. involving serious behavior or serious attitudes
Down
- 1. someone in book, movie, etc
- 2. making you feel very sad
- 3. something that needs a lot of skill, energy, and determination to deal with or achieve, especially something you have never done before and will enjoy doing
- 5. a block used for building walls and other structures
- 7. a substance used in chemistry or produced by a process involving chemistry
- 9. worth a lot of money
- 11. to communicate ideas or feelings indirectly
- 13. a plant or animal group whose members all have similar general features and are able to produce young plants or animals together
- 14. a feeling that you experience, for example love, fear, or anger
- 16. an artificial river
- 17. a wall built across a river to stop the water from flowing, especially in order to create a lake or to help to produce electric power
- 20. to make someone relaxed enough to sleep
- 21. very soft wet earth