Name: _____________________________________________________
Date: _____________
Period: ____
LAB: POROSITY AND PERMEABILITY
1. What are the three major differences between soil samples?
1. _____________________________
2. _____________________________
3. _____________________________
2. Sketch quick diagrams to show the following soil characteristics.
Unsorted
Sorted
Angular
Rounded
Loosely Packed
Tightly Packed
3. What is porosity? _______________________________________________________________________
4. What is permeability? ____________________________________________________________________
Run the experiment and use the animation and the provided data to complete the following:
5. What information will help you determine which sample is most porous?
_______________________________________________________________________________________
6. What information will help you determine which sample is most permeable?
_______________________________________________________________________________________
7. Draw a graph comparing the amount of water
that was held by containers A, B, and C.
8. Draw a graph comparing how long it took for
containers A, B, and C to drain.
200 ml
4.0 sec.
150 ml
3.0 sec.
100 ml
2.0 sec.
50 ml
1.0 sec.
0 ml
A
B
C
0 sec.
A
B
C
9. What is the relationship between particle size and porosity?
_______________________________________________________________________________________
10. What is the relationship between particle size and permeability?
_______________________________________________________________________________________
11. How is the porosity and permeability of sample D different from that of samples A, B, and C? Why?
_______________________________________________________________________________________