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

Fact: migration is when animals move themselves from a cooler climate to a warmer climate for the winter
A bird species may decide to relocate to hotter areas when weather?

Fact: natural gas is a source of heat by burning

Many families survive the winter thanks to?

