Question

Disturbances inside Earth’s core cause earthquakes. The starting point of the disturbance is called the epicenter. Why does the amplitude of a seismic wave usually decrease as the wave moves away from the epicenter?
A.
The waves lose energy in the form of heat.
B.
The frequency of the waves continues to increase.
C.
The wavelength of the waves continues to decrease.
D.
The waves encounter entirely different mediums.

Answer 1

Answer:

D.

Explanation:

The waves lose energy when they move through materials with different densities. Though this causes an increase in frequency,increase in frequency cannot be deemed as a reason to the decreasing amplitude of seismic wave.

Answer 2

D.

The waves encounter entirely different medium.

Thank You!