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Our Dynamic Earth!!! By BroGamer101 Americancookie123 and Eatpotatos2 • • • • • • • In the end we hope you will know about: Tsunami’s Volcanoes Earthquakes The Structure Of The Earth Plate Tectonics And The Pacific Ring Of Fire • Where the Earths crust is thin or cracked, magma flows up to the surface creating a volcano. • Volcanoes are usually mountains with a bowl in the top called a crater. • Most eruptions happen in the crater. • Sometimes lava flows out through the vents to. • When magma erupts from the ground its then lava when it cools it becomes solid rock. • What is a Tsunami? • A long, high sea wave caused by an earthquake or Tectonic plates. • If a Tsunami is caused by Tectonic plates, one tectonic plate overlaps another in a fast motion it creates a Tsunami. • If a Tsunami is approaching then go to high places, if you are alarmed early then go and catch a flight or other places that cant touch you. • The strength or magnitude of an earthquake is measured by scientists using a scale called the ‘Moment Magnitude Scale. • A magnitude (one magnitude) can be predicted by very sensitive equipment. • Earthquakes can cause tsunamis because earthquakes can go under the sea and send vibrations up to the top and cause tsunamis. • The best possible place to be hiding or to be safe is under a table in a doorway. • The Structure of the earth has a crust, a mantle, outer core and inner core. • The inner core is made out of iron and Nickel with temperatures up to 5,500 c • The outer core is made out of liquid and also made out of iron and nickel. • Mantle is approximately 2900km thick and made out of iron and nickel. • The crust is a thin layer between 0-60km.