Which of the following regions was the result of plumes of hot mantle rising in a hot spot within a plate?
A) Alaska's Aleutian Islands
B) Japan and the Philippines
C) the islands of Hawaii
D) the volcano Mount St. Helens
E) all of the above
Question 2
When should we know if any extra-solar planetary systems are like ours?
A) in just a few years
B) any day now, thanks to new, large, ground-based telescopes
C) in a decade or two, through our current space missions
D) We have already discovered several systems just like ours, through the Kepler mission.
Spot the missing letter
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The Stripping of Mercury’s Mantle
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