week of Dec. 1 hard words

These are the words selected by students as this week's most difficult:
1. asparagus
2. echolocation
3. civilization
4. natron
5. canopic
6. hemispheres
7. ancient
8. quartz
9. marsupials
10. amulets
11. metamorphic
12. consequently
13. Silvis
14. totem
15. Aboriginal
16. eucalyptus