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

[Q]: Collision theory states that chemical reactions occur when atoms, ions, or molecules collide.
[A]: What states that chemical reactions occur when atoms, ions, or molecules collide?


[Q]: The bones of the newborn skull are not fully ossified and are separated by large areas called fontanelles.
[A]: The bones of the newborn skull are not fully ossified and are separated by large areas called what?


[Q]: Since the electric field lines point radially away from the charge, they are perpendicular to equipotential lines.
[A]:
Since the electric field lines point radially away from the charge, they are perpendicular to what?