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.

Example Input: Question: What cells carry oxygen? Answer: red blood cells
Example Output: Red blood cells carry oxygen, white blood cells defend the body, and platelets help blood clot.

Example Input: Question: By what kind of change can a chemical change be reversed? Answer: another chemical change
Example Output: Because chemical changes result in different substances, they often cannot be undone. Some chemical changes can be reversed, but only by other chemical changes.

Example Input: Question: What two gases are the main components of air? Answer: nitrogen and oxygen
Example Output:
A: Other examples of liquid mixtures include salt water and salad dressing. Air is a mixture of gases, mainly nitrogen and oxygen. The rock pictured in the Figure below is a solid mixture.