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

Plasma matter makes up most of the universe.
What type of matter makes up most of the universe?

Compounds containing an atom of nitrogen element, bonded in a hydrocarbon framework, are classified as amines.
Compounds containing an atom of what element, bonded in a hydrocarbon framework, are classified as amines?

Plates are thin , young , and hot causes earthquakes at mid-ocean ridges to be small and shallow.

What causes earthquakes at mid-ocean ridges to be small and shallow?