instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
The seven unique crystal types are defined by faces parts of themselves (parts that intersect at various angles).
answer:
The seven unique crystal types are defined by what parts of themselves (parts that intersect at various angles)?

question:
Reptiles typically reproduce sexually.
answer:
How do reptiles typically reproduce?

question:
Suspension small particles, such as clay and silt, are in mixed in water but do not disolve in the water, what state are they in.
answer:
When small particles, such as clay and silt, are in mixed in water but do not disolve in the water, what state are they in?