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]: Diffusion is the term for the movement of molecules from an area of high concentration to an area of low concentration.
[A]: What is the term for the movement of molecules from an area of high concentration to an area of low concentration?

[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?