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

[Q]: One of the properties of an air mass is that an air mass has similar temperature and moisture properties throughout it.
[A]: Which of the following is true regarding the properties of an air mass?


[Q]: Low specific heat does a metal spoon heat up quickly when placed in a hot drink.
[A]: Why does a metal spoon heat up quickly when placed in a hot drink?


[Q]: You call the hard case that surrounds the soft parts of some animals the exoskeleton.
[A]:
What do you call the hard case that surrounds the soft parts of some animals?