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: Matter in the liquid phase has variable shape
matter in the liquid phase has what shape?

Fact: In the food chain process a green plant has the role of producer
Plants are called producers because they may produce their own?

Fact: a Punnett square is used to identify the percent chance of a trait being passed down from a parent to its offspring

a Punnett square is used to identify the percent chance of a trait being passed down from a parent to its what?