Definition: Given a scientific passage and an answer, generate a question for the given answer.
Input: Passage: Chemistry is the study of matter and energy and how they interact, mainly at the level of atoms and molecules. Basic concepts in chemistry include chemicals, which are specific types of matter, and chemical reactions. In a chemical reaction, atoms or molecules of certain types of matter combine chemically to form other types of matter. All chemical reactions involve energy. Answer: chemistry
Output:
What is the study of the interaction between matter and energy called?