Across
- 2. component that holds the material together
- 4. a part that forms with other parts to something bigger
- 6. substance produced by some trees and plants OR substance produced chemically for use in industry
- 9. a part of a tree which grows out from the trunk
- 11. absolutely necessary
- 13. strong and not easily broken
- 14. a feature or quality of something
Down
- 1. easily broken or made to fail
- 3. something that is made of various parts
- 5. without its top or end section
- 7. keeping a clear shape, hard
- 8. the thick main stem of a tree
- 10. having an empty space or hole inside something
- 12. firm or hard