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- 1. Multiple Choice
Cleavage can be described as
unpredictable and random breakage
the predictable way minerals break along weak bonding planes
the color of a mineral powder
- 2. Multiple Choice
This is galena. The cleavage is described as
good, in 3 directions, cubic habit
poor in, in 1 direction, basal habit
no cleavage--only fracture
- 3. Multiple Choice
What is the dominant form of breakage seen in this magnetite?
cleavage
fracture
- 4. Multiple Choice
This mineral is gypsum. It has a hardness of 2. The cleavage would be described as
good, in 1 direction, basal habit
poor, in 2 directions, prismatic habit
no cleavage--only fracture
poor, in 3 directions, cubic habit
- 5. Multiple Choice
Pictured is a quartz crystal. This mineral has NO cleavage. Explain
the flat sides you see are NOT broken--the crystal grew that way
Quartz is not a mineral so therefore it can't have cleavage
- 6. Multiple Choice
Halite (table salt) has a cleavage this is described as
poor, cuboidal
basal
good, in 3 directions, cubic habit
none of these
- 7. Multiple Choice
Halite and calcite have perfect (good) cleavage in 3 directions, but calcite is different because it has
rhombohedral crystal habit
cleavage in 3 directions
- 8. Multiple Choice
Some minerals we will not be able to find a STREAK of because they are
radioactive
made of CO2
harder than a streak plate
- 9. Multiple Choice
Which rock/mineral dissolves in rainwater (carbonic acid)?
calcite
limestone
chalk
quartz
- 10. Multiple Choice
This is the most common mineral. It is a silicate (SiO2) so it does not react to acid. It is 7 hardness with NO cleavage--only fracture.
halite
quartz
calcite
gypsum
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