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

[Q]: A student should use a balance to compare the masses of two small rocks.
[A]: Which tool should a student use to compare the masses of two small rocks?


[Q]: Some plants have stolons, or stems, that run along the ground and are commonly called runners.
[A]: Some plants have stolons, or stems, that run along the ground and are commonly called what?


[Q]: The mass remains the same does burning matter affect its mass.
[A]:
How does burning matter affect its mass?