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

[Q]: Opaque is the term for matter that does not let any light pass through.
[A]: What is the term for matter that does not let any light pass through?


[Q]: Matter that mechanical wave energy can only travel through is medium.
[A]: What is the name of matter that mechanical wave energy can only travel through?


[Q]: The farther an area is from the equator, it gets lower happens to the temperature.
[A]:
The farther an area is from the equator, what happens to the temperature?