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

Input: Consider Input: The properties of the alkali metals are similar to each other as expected for elements in the same family.

Output: The properties of the alkali metals are similar to each other as expected for elements in the same what?


Input: Consider Input: Evolution occurs by natural selection, a process whereby better-adapted members pass along their traits, according to darwin.

Output: Evolution occurs by what process whereby better-adapted members pass along their traits, according to darwin?


Input: Consider Input: Evaporation occurs when water on the surface changes to water vapor.


Output: What occurs when water on the surface changes to water vapor?