Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: The water in some springs are hot because they're heated by hot magma.

A: The water in some springs are hot because they're heated by what?
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Q: You call elements that contain only atoms of one type of element native elements.

A: What do you call elements that contain only atoms of one type of element?
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Q: Genome mapping term is used to describe the process of finding the location of genes on each chromosome.

A:
What term is used to describe the process of finding the location of genes on each chromosome?
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