Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: 40 m/s north of the following represents the velocity of a moving object.

Answer: Which of the following represents the velocity of a moving object?

Question: Cranium (skull) is the term for the skeletal structure of the head that supports the face and protects the brain.

Answer: What is the term for the skeletal structure of the head that supports the face and protects the brain?

Question: Chemical sedimentary rocks forms when crystals precipitate out from a liquid.

Answer:
What forms when crystals precipitate out from a liquid?