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

[Q]: Water plus other substances makes a(n) solution.
[A]: Water plus other substances makes what?

[Q]: Thermosphere is the upper-most atmosphere.
[A]: What is the upper-most atmosphere known as?

[Q]: Instantaneous velocity is defined as the velocity of the object at a given moment.
[A]:
What is defined as the velocity of the object at a given moment?