Procedure:

1. For safety wear your goggles over your eyes and keep on your lab apron.
2. Cut 3 paper cups so that each is only 3 cm deep. DO NOT cut the bottom out of the cups.
3. Label each cup A, B And C
4. Fill each cup half full with water
   Part A
5. Add two heaping teaspoons of salt to the water in cup A
6. Stir the until most of the salt has dissolved
7. Add sand slowly to cup A until it almost fills the cup
8. Stir the sand and salt water together
9. Carefully pour out any excess water. Try not to spill out any sand
10. Set cup A in a place where it will not be disturbed for 24 hours
11. Make a hypothesis. What do you think you will observe when you look at Cup A in 24 hours?
12. Record your initial data for cup A
    Part B
13. Add one teaspoon of Plaster of Paris to the water in cup B and stir until mixed
14. Add a mixture of half sand and half pebbles to cup B.
15. Mix well. DO NOT POUR ANY EXCESS PLASTER OF PARIS IN THE SINK. It could permanently seal the pipes closed
16. Set cup B in a place it will not be disturbed for 24 hours
17. Make a hypothesis: What do you think you will observe when you look at cup B in 24 hours?
18. Record your initial data for cup B
    Part C
19. Pour sand into cup C until it almost fills the cup
20. Stir well
21. Carefully pour out any excess water and place pebbles on top of the wet sand
22. Set cup C in a place where it will not be disturbed for 24 hours
23. Make a hypothesis: What do you think you will observe when you look at cup C in 24 hours?
24. Record your initial data for cup C
25. Observe the samples in cups A, B and C the next day. Use a hand lens
26. Record your findings for cup A , B and C