Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Fact: magnetic attraction pulls two objects together
if two things seemingly come closer together without a person interfering, which of these is likely?

Fact: a thermal insulator slows the transfer of heat
A thermal insulator slows the transfer of what?

Fact: the moon reflects sunlight towards the Earth

The moon is bright in the night sky, especially when full because?