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 is solid water that forms when water vapor undergoes deposition? Answer: frost

A: Frost is solid water that forms when water vapor undergoes deposition.
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Q: Question: What do the liver, gallbladder, and pancreas contribute that aid in digestion? Answer: chemicals

A: The liver, gallbladder, and pancreas contribute chemicals that aid in digestion.
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Q: Question: What term is used to describe foods containing active cultures of beneficial bacteria? Answer: probiotic

A:
Yogurt is a good source of calcium. Yogurt also contains active cultures of "good" bacteria. Foods that contain these beneficial bacteria are sometimes called "probiotic. ".
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