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.

[Q]: Question: What type of intense storm is a system of winds that rotate around a low pressure center, resulting in swirling air that rises and cools to create clouds and precipitation? Answer: cyclone
[A]: Cyclones can be the most intense storms on Earth. A cyclone is a system of winds that rotate around a low pressure center. The swirling air rises and cools. This creates clouds and precipitation.

[Q]: Question: What are the tiny sacs in the lungs where gas exchange takes place? Answer: alveoli
[A]: Alveoli are tiny sacs in the lungs where gas exchange takes place.

[Q]: Question: Substances produced by a reaction are known as? Answer: products
[A]:
Products are substances that are produced in the reaction.