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: Body waves travel through the earth and arrive at seismograms before what? Answer: surface waves

A: Body waves travel through the Earth and arrive at seismograms before surface waves.
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Q: Question: What group of elements cannot conduct electricity? Answer: nonmetals

A: Nonmetals are elements that generally cannot conduct electricity. They are the second largest class of elements after metals. Examples of nonmetals include hydrogen, carbon, chlorine, and helium.
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Q: Question: Many innovative farming methods can prevent what type of erosion, which is especially important in agriculture? Answer: soil erosion

A:
There are many farming methods that help prevent soil erosion.
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