Given a scientific passage and an answer, generate a question for the given answer.

Input: Consider Input: Passage: Gases are also capable of dissolving in liquids. There are many examples of this in our everyday lives. For example, carbonated beverages contain dissolved carbon dioxide. We notice this when bubbles come out of solution when the beverage is opened. Another example is when oxygen from the air we breathe dissolves in our blood, where it is transported throughout the body. Fish and other aquatic organisms use gills to capture dissolved oxygen from their environments. Answer: oxygen

Output: Fish and other aquatic organisms use gills to capture dissolved what?

Input: Consider Input: Passage: Chemistry is based on the modern atomic theory, which states that all matter is composed of atoms. Answer: chemistry

Output: What branch of science is based on the modern atomic theory, which states that all matter is composed of atoms?

Input: Consider Input: Passage: An ionic bond is the force of attraction that holds together positive and negative ions. It forms when atoms of a metallic element give up electrons to atoms of a nonmetallic element. The Figure below shows how this happens. Answer: ionic bond
Output: What is the force of attraction that holds together positive and negative ions?