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

Example Input: Humans have 23 pairs pairs of chromosomes.
Example Output: How many pairs of chromosomes do human have ?

Example Input: Changing the shape of an elastic material gives it potential energy.
Example Output: Changing the shape of an elastic material gives it what type of energy?

Example Input: Hot magma beneath the surface mixes with water and forms gas.
Example Output:
Hot magma beneath the surface mixes with water and forms what?