question: Write a question you would see in a school textbook.
answer: A student mixed baking soda with vinegar and observed that the reaction was endothermic. When is a reaction endothermic?

question: Write a question you would see in a school textbook.
answer: Which two body systems are involved in inhaling oxygen and exhaling carbon dioxide?

question: Write a question you would see in a school textbook.
answer:
An electrical circuit can be used to break down water into hydrogen and oxygen. In this process, electrical energy produces