instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Although they differ vastly in hardness, pencil lead and diamonds both contain carbon.
answer:
Although they differ vastly in hardness, pencil lead and diamonds both contain what element?


question:
Springs or geysers do we call heated groundwater that erupts from the ground under pressure.
answer:
What do we call heated groundwater that erupts from the ground under pressure?


question:
Osmolality is the ratio of solutes in a solution to a volume of solvent in a solution.
answer:

What is the ratio of solutes in a solution to a volume of solvent in a solution known as?