Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: The reverse process of moving material into a cell is the process of exocytosis.

A: The reverse process of moving material into a cell is the process of what?
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Q: To determine the atomic weight of an element, you should add up protons and neutrons.

A: How do you determine the atomic weight of an element?
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Q: A definite shape and a definite volume are properties of the solid, only state(s) of matter.

A:
A definite shape and a definite volume are properties of which state of matter?
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