Multiple Choice
The inner core is solid because
A) it is composed of iron and nickel.
B) the surrounding outer layers act as a blanket to insulate the core.
C) pressure from the weight of the surrounding layers prevents the inner core from melting.
D) None of these, for the inner core is not solid, but liquid.
Correct Answer:
Verified
Correct Answer:
Verified
Q19: Which waves indicate the most extensive shadow?
Q20: Spreading centers occur along<br>A)trenches.<br>B)transform faults.<br>C)mid-ocean ridges.<br>D)the northern
Q21: Earth's magnetic field<br>A)never appreciably changes.<br>B)has reversed itself
Q23: The balance of gravitational and buoyant forces
Q25: New lithosphere is formed at<br>A)ocean trenches.<br>B)convergent plate
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
Q58: Earth's internal layers were discovered by studying<br>A)seismic