instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Collision theory states that chemical reactions occur when atoms, ions, or molecules collide.
answer:
What states that chemical reactions occur when atoms, ions, or molecules collide?


question:
The sun and the moon appear to be about the same size in the sky because the moon is smaller in diameter and is closer to earth than the sun.
answer:
Which statement best explains why the Sun and the Moon appear to be about the same size in the sky?


question:
Somatic nervous system controls the movements of hands and arms.
answer:

What controls the movements of hands and arms?