The nucleus of old crystalline rock in each of the principal continental masses is called a
A) basalt mass.
B) continental shield, or craton.
C) mountain mass.
D) composite zone.
Question 2
A hypsographic curve is
A) a graph that shows the change in temperature with depth below the surface of a continent.
B) a graph that shows the change in temperature with depth below the surface of the ocean floor.
C) a generalized curve showing Earth's surface by area and elevation in relation to sea level.
D) a graph that shows Earth is of relatively high relief.
E) a graph that shows Earth's relief is great when compared to its diameter.
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