NATURE-STUDY LESSONS. 57 



5. {a) Observe and examine worm-casts. 



(b) Note how they are heaped, the shape and 



general appearance of each. 

 {c) Discover where these casts come from and how 

 the worm brings them to the surface. 



6. {a) Keep a worm out of the ground for a time and 



then compare it with one just taken out. 

 (fi) What difference is observed ? 

 if) Infer the reason for this. 



7. {a) With a trowel remove layer after layer of earth 



and expose several worm-holes, being careful 

 to examine the holes as they descend. 

 {b) Note what is found in the holes. 



(c) Infer the use of these to the worm and to man. 



8. {a) Describe the home of the worm. 



(J?) Note its rows of halls and how the walls are 



prevented from falling in. 

 (c) Draw a plan of the home of the worm. 



9. (a) Place a few worms in a small water-tight box 



partly filled with earth, and after they have 

 burrowed a home for themselves pour a little 

 water into the box. 



(b) Observe the actions of the worms. 



(c) Infer why there are so many worms to be seen 



just after a rainstorm. 



10. Observe whether worms live alone or are social. 



11. Collect the worm-casts for a few days from the 

 same square yard of earth. Weigh them and then esti- 

 mate how much would be brought to the surface during 

 one day on an acre. 



12. Discover whether worms bring up as much earth 

 during the daytime as they do at night. 



