GEOLOGY

Detailed explanation-1: -Seismic waves carry the energy of an earthquake.-They compress and expand the ground like an accordion.-They vibrate from side to side as well as up and down.

Detailed explanation-2: -There are three categories of seismic waves: P waves, S waves, and surfaces waves. P waves-Earthquake waves that compress and expand the ground like an accordion.

Detailed explanation-3: -P waves can move through solid rock and fluids, like water or the liquid layers of the Earth. It squishes and stretches the rock it moves through just like sound waves compress and expand the air as they move through it.

Detailed explanation-4: -In P or compressional waves, the vibration of the rock is in the direction of propagation. P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation.

Detailed explanation-5: -The answer is compressional waves. Remind them that in compressional waves particles of material move back and forth parallel to the direction in which the wave itself moves. As a compressional wave passes, the material first compresses and then expands.