14. What makes the worm’s body so dark?
15. Why is it so hard to pull a worm out of its hole?
16. Tell me how a worm makes its hole.
17. Why does the worm fill itself with earth?
18. What are worm-casts?
19. How do worms help to build the world?
20. What kind of weather do worms like best?
21. How does a worm close up the door of its hole?
22. What becomes of worms in very hot, dry weather?
23. When can you find worms outside their holes?