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Questions for Discussion: Cave Formation: Kane Cave

What is a microbe? Describe the link between microbes and sulfuric acid in caves.
Regarding the connection between bacteria and cave formation, scientists wondered, "Did the bacteria do all this or did this all happen and they just moved in because it was a great spot to live?" Describe the experiment they performed to answer this question.
Describe the results of the experiment scientists performed to find out if microbes influenced cave formation. Do you think their conclusion is justified? Explain.