conservation: preservation from harm or decay; protection from loss or from being used up
contribute: to help bring about
enthusiastic: eagerly interested
environment: condition of the air, water, soil, etc.
investigation: a careful search
Spelling Words
1. example 11. cancel
2. level 12. chuckle
3. human* 13. fossil
4. quarrel 14. toboggan
5. scramble 15. veteran
6. evil 16. chisel
7. oxygen 17. suburban
8. wooden 18. single
9. double 19. sudden
10. travel* 20. beagle
Challenge Words
21. obstacle 24. pummel
22. kindergarten 25. enlighten
23. abdomen
Grammar: Possessive Nouns