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

[EX Q]: Transpiration is when plant roots absorb liquid water and release water vapor into the atmosphere.
[EX A]: What is it called when plant roots absorb liquid water and release water vapor into the atmosphere?

[EX Q]: Do particles collide more in two reactants fluid they are both in fluid forms or solid forms.
[EX A]: Do particles collide more in two reactants when they are both in fluid forms or solid forms?

[EX Q]: Humidity happens happens when liquid water evaporates.
[EX A]:
What happens when liquid water evaporates?