instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Articular processes allow for the greatest range of rotation within the vertebral column and facilitate the movement of the head.
answer:
What processes allow for the greatest range of rotation within the vertebral column and facilitate the movement of the head?


question:
A bow wake is created when the wave source moves faster than the wave propagation speed.
answer:
What is created when the wave source moves faster than the wave propagation speed?


question:
Carried through body happens if cancer cells enter the blood stream.
answer:

What happens if cancer cells enter the blood stream?