PPT-Visualizing Relationships Between Earthquakes, Volcanoes, and Plate Tectonics

Western US Authors Ruth Powers UNAVCO Master TeachinginResidence Becca Walker and Shelley Olds UNAVCO Activity Outcomes Learners should be able to Describe how the locations of earthquakes volcanoes and velocity vectors from GPS stations in the Western United States inform us about plate boundary zones. Structure of the Earth. The Earth is made up of 3 main layers:. Core. Mantle. Crust. Inner core. Outer core. Mantle. Crust. The Crust. This is where we live!. The Earth’s crust is made of:. Continental Crust. Volcanism is mostly focused at plate margins. Pacific Ring of Fire. This map shows the margins of the Pacific tectonic plate and surrounding region. The red dots show the location of active volcanism. Notice how the majority of the volcanism is focused in lines along the plate boundaries? For this region is the area known as the “Pacific Ring of Fire”.. . T. his . is a map of Pompeii's famous volcano called . Mount . Vesuvius. . How many volcanoes are there in the . world?. There are around 1510 'active' volcanoes in the world. We currently know of 80 or more which are under the oceans. . Composition of the Earth: . Layers of the Earth: . Crust: . 5-100km thick. . Oceanic crust: thin and more dense, mostly basalt . Continental crust: thicker and less dense, made up of more granite than oceanic crust . Why does Western Washington have so many earthquakes and volcanoes?. Western Washington has many earthquakes and volcanoes because we are close to a plate boundary. A small oceanic plate (Juan de Fuca) is sinking under the North American plate. This creates a trench and a Subduction Zone. As the Juan de Fuca plate slides under the North American plate it sometimes catches and great pressure builds up. When the plates snap the pressure is released in the form of an earthquake. The leading edge of the Juan de Fuca plate melts and magma pushes its way to the surface creating volcanoes like Mount Rainier and Mt. St. Helens.. 6. th. year Geography. Learning Outcome. Revise Core Book. Chapters 1 – 3. Plate Tectonics. Earthquakes. Volcanoes. Examine the exam questions on these topics. Theory of Plate Tectonics. Earths plates move. Earth’s Dynamic Crust. Original Horizontality (law of superposition):. Assumption . that sedimentary/igneous rocks form in horizontal layers . Deformity. Folded: Layers are bent/curved. Deformity. Where are the major zones of volcanism?. What are the parts of a volcano?. How do volcanic landforms differ?. Copyright © McGraw-Hill Education. Volcanoes. Review. convergent. New. volcanism. hot spot. Compare the features of volcanoes.. Describe the stages in volcano formation.. What are Volcanoes?. Volcanoes are vents through which molten rock and gas escape from a . magma chamber.. Volcanoes can differ. Divergent. Convergent. Transform. Three types of plate boundary. Spreading ridges. As plates move apart new material is erupted to fill the gap. Divergent Boundaries. Iceland has a divergent plate boundary running through its middle. Volcanoes. Volcano:. mountain that forms in Earth’s crust when molten material (magma) reaches the surface. . Remember, . magma . is molten rock below ground; . lava. is molten rock at the surface. . Richard Palin, University of Oxford, UK;. M. Santosh, China University of Geosciences, Beijing (CUGB). University of Adelaide, Australia. Ortelius World Map . Typvs. Orbis . Terrarvm. , 1570.. Culmination of centuries of research. Structure of the Earth. Key terms . Earth’s Structure- How the Earth is made up beyond what we see. . Plate Tectonics- Understanding how the Earth’s surface is divided up into sections. . Inner Core- The central part of the Earth; made of solid iron. . Enter . Silently. Grab Materials. Begin Do Now. Write in your planner for the week. Open your notebook to the front of page 17. . I Do (5 min) . Topic: . Earth. Front Page 17 Title: “How to Make a Concept Map”.