Science - Earth and Volcanoes Outline essays

Science - Earth and Volcanoes Outline essays 1.| Earthquakes occur mostly at the boundaries of the tectonic plates A.| Earthquakes occur at the plate boundaries 1.| as the plates move, their edges experience immense pressure eventually the stress becomes so great that it breaks rock along the fault line. Energy released as seismic 2.| the point in the earth where an earthquake originates is called the focus, earthquake waves travel in all directions from the focus. 3.| the point on the surface immediately above the focus is called the epicenter, where the damage is usually the greatest. B.| Energy from the earthquakes is transferred by waves. 1.| the energy released by an earthquake is measured as shock waves; earthquakes generate three types of waves. 2.| Longitudinal waves move faster through rock than other waves do and are the first waves to reach recording station, longitudinal waves are also called P for 3.| the second type of wave is a transverse wave. Transverse waves move slower than longitudinal waves. These are known as S for secondary waves. C.| Waves move through earth along its surface 1.| Both P waves and S waves spread out from the focus in all directions, in contrast the third type of wave only moves across the earths surface, these 2.| the earths surface bends and reshapes as it shakes, the result a rolling motion. 3.| surface waves cause more destruction than other waves, because of the rolling A.| Seismologists detect and measure earthquakes 1.| Seismology is the study of earthquakes, they use sensitive machines called seismographs to record data about earthquakes and the waves. 2.| Records of seismic activity are called seismograms. ...