If it has a question "?" mark at the end of the sentence.
A scientific question implies that you are inquiring about the world around you, and expecting a fairly precise answer. Also, if the subject matter of the question is such that it might normally concern one of the scientific disciplines, it will get classified as a science question.
which area of technology best classifies an iPhone
A taxonomist is a person who classifies things into kingdoms.
Lipids
Taxonomy.
Astronomers classify stars.
kingdom
brachiopods
ibook
It is a homogeneous mixture.
perpendicular
Zoologist