The height of a tsunami grows as it approaches a coastline primarily because
A)its energy level increases.
B)its wavelength shortens.
C)the height of the surf is added to the height of the tsunami.
D)the coastline is typically lower than sea level.
E)of the Coriolis force.

Question

Quizplus · Accepted Answer

As a tsunami approaches a coastline and its leading edge starts to slow down, the trailing wave crests pile up behind it. This results in a shortening of the wavelength and an increase in wave height. The energy of the wave remains the same, but it is concentrated into a shorter distance, resulting in a taller wave. Therefore, the height of a tsunami grows as it approaches a coastline primarily because its wavelength shortens.

The Height of a Tsunami Grows as It Approaches a Coastline