Across
- 1. people or things cannot be seen or found
- 5. to give someone something that they need
- 9. a set of connected things or devices
- 10. put something on the surface of something
- 12. be destroyed by fire
- 13. it is not good for people or things
- 14. all the people of about the same age within a society or a family
- 16. belonging to a particular person or thing
- 18. damage by harmful waste
Down
- 2. extremely surprising
- 3. to search a place and discover things
- 4. extremely cold
- 6. an area, often covered with sand or rocks
- 7. a way of dealing with a difficult problem
- 8. keep someone or something safe from injury
- 11. to be moved on a current of air
- 15. to arrive at a place
- 17. a large round object in space