A volcanologist extracts a piece of rock near a volcano site and observes no visible crystals. After studying the rock for a while, he assumes it is obsidian. Why does he do so?
A) Obsidian is always hot.
B) Obsidian forms underground.
C) Obsidian is green.
D) Obsidian forms in lava flows.
Answer: D
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A. 2/5 m/s. B. 6/5 m/s. C. 5/6 m/s. D. 1/2 m/s.
Atmospheric concentrations of ____ can vary significantly depending on time and location
A) hydrogen B) water vapor C) helium D) argon
Explain the benefits of upgrading the current NEXRAD Doppler radar network to dual-polarization technology
What will be an ideal response?
Where should you move to if you wanted to live in a region with the greatest annual range of temperatures? If you changed your mind and wanted to live in the region with the lowest annual temperature range where should you go? What are the qualities
that create each of these situations?