Question

multiple choice question
which seismic waves cause particles inside earth to move back and forth in the same direction that the waves are travelling?
o ground waves
o primary waves
o secondary waves
o surface waves

Explanation:

Primary waves (\(P -\) waves) are compressional waves. In \(P -\) waves, the particles of the medium (in this case, inside the Earth) move back and forth in the same direction as the wave is traveling. Secondary waves (\(S -\) waves) are shear waves, where particle motion is perpendicular to the wave - propagation direction. Surface waves have more complex particle - motion patterns (e.g., rolling or shaking the ground more like water waves in some aspects). There is no such standard classification as "ground waves" in the context of typical seismic wave types for this question.

Answer:

primary waves