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 are used to lift large masses of magnetic materials such as scrap iron, rolls of steel, and auto parts? Answer: electromagnets

A: Electromagnets find use in many practical applications. Electromagnets are used to lift large masses of magnetic materials such as scrap iron, rolls of steel, and auto parts.
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Q: Question: What is the smallest class of elements? Answer: metalloids

A: Metalloids are the smallest class of elements, containing just six elements. They fall between metals and nonmetals in the periodic table.
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Q: Question: There are two types of digestion, mechanical and what else? Answer: chemical

A:
Digestion consists of mechanical and chemical digestion.
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