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What is an earthquake? pp. G125-G126. *) Define earthquake. *) Define seismic waves. *) Define fault. Define shear strength. Define elastic rebound. Define friction. List the two reasons why rocks don’t slip continuously. *)Define focus. *)Define epicenter. Define fault scarp. Illustrate Figure 1. *)Define primary waves (p-waves) *)Which seismic waves are first to reach a location away from the focus? Through which materials can primary waves travel? Compare the speed of travel of sound through air, how much faster are p-waves through solid rock? What is their speed? *)Define secondary waves (s-waves) *)Define surface wave. *)Which waves cause the most damage? Why? Objective: To learn the various identifiable components of earthquakes, the types of waves produced, their speed and type of motion, and their effects.