Multiple Choice
The velocities of seismic waves traveling from earthquake foci ________.
A) are uniform throughout all layers of Earth
B) decrease at a constant rate with depth
C) increase at a constant rate with depth
D) generally increase with depth,but occasionally make abrupt jumps
Correct Answer:

Verified
Correct Answer:
Verified
Q18: A silica-rich igneous rock that has large
Q20: In general,the mantle is made of the
Q22: In the whole Earth,the four most common
Q24: Earth's magnetic field is generated by the
Q25: The lithosphere lies directly above the<br>A) transition
Q25: The region of space that contains all
Q26: If one were to ride a hot
Q27: Earth's geothermal gradient is the rate of
Q54: As compared to the asthenosphere,the lithosphere is
Q56: Which of the following lists compositions in