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

Molar masses can be used to determine the mass of a quantity of material.
What can be used to determine the mass of a quantity of material?

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.
Which statement best explains why the Sun and the Moon appear to be about the same size in the sky?

The temperature at which all molecular motion has ceased is called absolute zero.
The temperature at which all molecular motion has ceased is called what?