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.
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Question: Question: What is a simple machine that consists of a rope wrapped around a grooved wheel? Answer: a pulley

Answer: A pulley is a simple machine that consists of a rope wrapped around a grooved wheel. Pulleys are generally used to lift a load.

Question: Question: Kangaroos, koala and opossums are part of what group? Answer: marsupials

Answer: Marsupials. Marsupials include the kangaroo, koala, and opossum.

Question: Question: What type of chloride is a non-volatile material, but does not dissolve in water? Answer: silver chloride

Answer:
Silver chloride is a non-volatile material, but does not dissolve in water. What effect will it have on the vapor pressure of water?.