the oldest seafloor on earth is
What will be an ideal response?
200 million years old
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According to the plate tectonics model, most global mountain ranges are associated with which kind of plate boundary?
A) Divergent B) Convergent C) Transform
Discuss the complex migration journey of Russian Old Believers from their homeland in western Russia in the 1600s to their present-day settlement in Oregon and Alaska
What will be an ideal response?
Hot spots form linear island chains because
A) the plate moves relative to the underlying hot spot. B) they are aligned with trenches formed by subduction. C) they occur along the midoceanic ridges.
Which of the following is the name of the free radical formed after radiation knocks an electron out of a water molecule?
A) hydronium B) hydroxide C) hydroxium D) hydroxyl