instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Force times distance is the equation for work.
answer:
Force times distance is the equation for what?


question:
One of the properties of an air mass is that an air mass has similar temperature and moisture properties throughout it.
answer:
Which of the following is true regarding the properties of an air mass?


question:
Amount of salt are aquatic biomes often classified.
answer:

How are aquatic biomes often classified?