Multiple Choice
The thickness of Earth's crust
A) varies from about 10 km under the continents to about 60 km under the oceans.
B) on average is about 10 km.
C) on average is about 60 km.
D) varies from about 5 km under the oceans to about 70 km under the continents.
Correct Answer:
Verified
Correct Answer:
Verified
Q26: The Mohorovicic discontinuity marks the change in
Q27: The propagation of seismic waves through Earth's
Q28: Magnetic surveys of the ocean floors reveal<br>A)alternating
Q29: The lithosphere includes<br>A)continental and oceanic crust.<br>B)the crust
Q32: Secondary waves can travel through all areas
Q33: The density of Earth's crust, mantle, and
Q34: The lithosphere floats atop the<br>A)mantle.<br>B)crust.<br>C)asthenosphere.<br>D)mohorovicic.
Q34: Describe the idea of continental drift.
Q35: What kind of forces act on the
Q36: Why are plate boundaries the sites of