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

[EX Q]: You call elements that contain only atoms of one type of element native elements.
[EX A]: What do you call elements that contain only atoms of one type of element?

[EX Q]: Solid is characterized by molecules with minimal movement and strong forces between them.
[EX A]: Which state of matter is characterized by molecules with minimal movement and strong forces between them?

[EX Q]: When explosion of gases creates pressure resulting in motion of a rocket, the force pushing the rocket is called thrust.
[EX A]:
When explosion of gases creates pressure resulting in motion of a rocket, the force pushing the rocket is called what?