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.

Ex Input:
Question: Water, carbon dioxide, and what other element are important agents of chemical weathering? Answer: oxygen

Ex Output:
Water, carbon dioxide, and oxygen are important agents of chemical weathering.

Ex Input:
Question: What is the active ingredient in household bleach? Answer: chlorine

Ex Output:
Chlorine is the active ingredient in household bleach. It removes stains from clothes. It can also be used to disinfect countertops and other surfaces.

Ex Input:
Question: What do you call sound that has a wave frequency higher than the human ear can detect? Answer: ultrasound

Ex Output:
Ultrasound is sound that has a wave frequency higher than the human ear can detect. It includes all sounds with wave frequencies higher than 20,000 waves per second, or 20,000 hertz (Hz).