instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Mechanical waves term describes waves that travel through matter.
answer:
What term describes waves that travel through matter?


question:
In the lungs, oxygen diffuses out of the alveoli and into capillaries.
answer:
In the lungs, oxygen diffuses out of the alveoli and into where?


question:
Humans typically have 23 pairs pairs of chromosomes.
answer:

Humans typically have how many pairs of chromosomes?