7. Sample 7: This sample has:
a. no cleavage (it fractures)
b. 1 cleavage plane
c. 2 cleavage planes at 90°
d. 3 cleavage planes at 90°
e. 4 cleavage planes
8. Sample 8: This sample has:
a. no cleavage (it fractures)
b. 1 cleavage plane
c. 2 cleavage planes not at 90°
d. 3 cleavage planes not at 90°
e. 4 cleavage planes
9. Sample 9: This sample has:
a. no cleavage (it fractures)
b. 1 cleavage plane
c. 2 cleavage planes not at 90°
d. 3 cleavage planes at 90°
e. 4 cleavage planes
10. Sample 10: This sample has:
a. no cleavage (it fractures)
b. 1 cleavage plane
c. 2 cleavage planes not at 90°
d. 2 cleavage planes at 90°
e. 4 cleavage planes
11. Sample 11: This sample has:
a. no cleavage (it fractures)
b. 1 cleavage plane
c. 2 cleavage planes not at 90°
d. 2 cleavage planes at 90°
e. 3 cleavage planes
12. Sample 11: What is this sample’s hardness?
a. harder than glass
b. softer than glass but harder than nail
c. softer than nail but harder than copper
d. softer than copper but harder than a fingernail
e. softer than a fingernail
13. Sample 12: This sample has:
a. no cleavage (it fractures)
b. 1 cleavage plane
c. 2 cleavage planes not at 90°
d. 2 cleavage planes at 90°
e. 3 cleavage planes
14. Sample 12: What is this sample’s hardness?
a. harder than glass
b. softer than glass but harder than nail
c. softer than nail but harder than copper
d. softer than copper but harder than a fingernail
e. softer than a fingernail