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Answer:
Definition-waves of energy that travel through Earth's layers, and are a result of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made explosions that give out low-frequency acoustic energy.
Explanation:
MAIN TYPES-Body waves,Surface waves
SUB TYPES-Primary waves,Secondary waves, Surface waves, Rayleigh waves
Primary waves-compressional waves that are longitudinal in nature
Secondary waves- travel slower than P waves and are also called "shear" waves because they don't change the volume of the material through which they propagate, they shear it.
Surface waves-span a wide frequency range, and the period of waves that are most damaging is usually 10 seconds or longer.
Rayleigh waves-secondary wave characterized by low frequency and strong energy
Questions;
Q1. Body waves can travel through the Earth's inner layers, but surface waves can only move along the surface of the planet like ripples on water.
Q2.Body waves are the type of waves that are useful for seismologist in their study of the earth's interior because they are the only type of waves that give information about the deep interior of the Earth. Body waves have two types, the P waves and the S waves. P waves are those that can travel to solid or fluid materials while S waves can travel only through solid materials.