Earthquakes

• Continental and oceanic plates are found on part of the Earth's crust.
• The three types of plate movement are: Convergent, Divergent, and Transform
• Convergent plates move towards each other
• Divergent plates move apart from each other
• Transform plates slide past one another
• An earthquake is an unpredictable vibration or sudden tremor of the earth's crust
• Tsunamis are large waves caused by underwater earthquakes.
• A volcano is a mountain that erupts with lava and ash.
• Focus- point of origin of an earthquake within the Earth's crust.
• Epicenter- point on the surface which is directly above the focus and where the effect of the earthquake will be strongest
• Seismic Waves: Waves that travel through the earth and are caused by earthquakes. They are referred to as primary and secondary waves.
• Tectonic plates float on an underlying, partly molten layer called the asthenosphere or the upper mantle.
• The movement of the plates result in earthquakes and volcanic eruptions.
• Seismology is the study of earthquakes and the processes that cause them.
• A seismometer records the magnitude of the shock waves.
• An aftershock is a relatively minor vibration of the Earth's surface following the main earthquake shock waves.
• Gigantic and destructive waves occur in coatal areas when there are earthquakes on the sea floor. They are known as tsunamis