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

You call elements that contain only atoms of one type of element native elements.
What do you call elements that contain only atoms of one type of element?

The tilt of earth on its axis is one factor that contributes to seasons occurring in new york state.
What is one factor that contributes to seasons occurring in New York State?

The earth's magnetic poles have switched places repeatedly in the past.

The earth's magnetic poles have done what repeatedly in the past?