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Questions for Discussion: Lava Sampling on Kilauea Volcano, Hawaiʻi

What questions are scientists trying to answer by lava sampling?
Why does scientist Mike Garcia refer to the basalt he is walking on as "the youngest real estate on Earth"?
How hot is the lava?
For what scientific reason does Mike Garcia quickly quench the hot lava with water?
What has the study of the composition of the lavas from Kilauea and Mauna Loa revealed about their origins and relationship?