Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Ex Input:
Question: What type of ions do ionic compounds contain? Answer: positive and negative

Ex Output:
An ionic compound contains positive and negative ions.

Ex Input:
Question: What takes both the shape and the volume of their container? Answer: gases

Ex Output:
Solids have a fixed volume and a fixed shape. Liquids have a fixed volume but take the shape of their container. Gases take both the volume and the shape of their container.

Ex Input:
Question: Soda fizzes when what common gas comes out of solution? Answer: carbon dioxide

Ex Output:
Soda fizzes when carbon dioxide comes out of solution. Which do you think will fizz more, warm soda or cold soda?.