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DO - NOW 1. Are volcanoes still erupting around the world? 2. Do volcanoes provide any benefit to our Earth? 3. What movement occurs at convergent boundaries? 4. What is a subduction zone? 5. What movement occurs at divergent boundaries? DO NOW • Create a presentation with your table group on the topic given to you • You will have 10 minutes to prepare & 3 minutes to present • The purpose is to re-teach your classmates about your topic in preparation for our quiz tomorrow • Roles: 2-3 speakers, 2 people writing notes, 1 while preparing, and 1 on the board during the presentation During Presentations • You are 100% focused on your classmates that are presenting • You are taking notes • You are asking questions, if necessary Yesterday’s Exit Ticket 1. 2. 3. 4. 5. What is convection? In which layer does convection take place? What is the heat source for convection? Which layer makes up the tectonic plates? What types of landforms are created at divergent boundaries? 6. What types of landforms are created at convergent boundaries? • Do NOW Agenda • YET • Objective • TET • Iceland and their dangers • -Intro / Youtube video and questions • - Volcano Discovery Site / Current volcanic activity site • - Guided Notes • - Hawaii Article / Anticipation Guide • - Gallery Crawl of Volcanoes • - Volcano Diagram Creation • - Exit Ticket Objective • SWBAT explain how volcanoes impact the lithosphere • SWBAT Locate volcanoes and relate back to plate boundaries. • SWBAT compare magma and lava. Today’s EXIT TICKET 1. What is the relationship between the temperature of magma and its viscosity? The higher the temperature, the more or less viscous the magma? 2. Name the three types of volcanoes AND list them in the order of least to most violent. 3. What region of the world are the most violent volcanoes found? 4. Draw a diagram of a cinder cone volcano and label the main parts (conduit, vent, crater, lava/pyroclastic material) Iceland Live! • http://www.npr.org/blogs/thetwoway/2014/09/22/349268575/massive-volcaniceruption-is-making-iceland-grow VOLCANOES!!!!!! • http://www.youtube.com/watch?v=jRfEGvp6 wDU • Take 1 minute to read the questions at the top of your guided video notes and be prepared to answer them in complete sentences during the video! Map of Volcanoes around the WORLD! Volcano Discovery • http://webcams.volcanodiscovery.com/Kilau ea • This site allows you to look at what is currently happening around the world with volcanoes and earthquakes! What is the difference between magma and lava? • REVIEW: What is the type of rock that forms when magma cools and hardens? Magma is below the Earth and forms intrusive igneous rock • What type of rocks forms when lava cools and hardens? Lava is what comes out of the volcano and forms extrusive igneous rock • THEY ARE BOTH TYPES OF IGNEOUS ROCK! What’s the difference?! –Think location… How a volcano erupts is based on viscosity. 1. What is viscosity? • Viscosity is how resistant a substance is to flowing. For example, honey is more viscous than water. (It’s thick, flows slowly) • Magma that contains more silica will be more viscous, magma that contains less silica will be less viscous. (flows easily) • Magma that is very viscous will explode, magma that is less viscous will flow. • Lava that is hotter will be less viscous (like if you heat up honey) and will flow more. • Lava contains dissolved gases, and if the lava is very viscous, those bubbles cannot expand. Instead, the bubbles will explode upwards. Viscosi – what?! • If the Shield volcano has faster flowing lava that creates new land, does it have a high viscosity or low viscosity? • If the Composite Cone has a slower flowing lava that explodes due to the high content of silica, does it have a high viscosity or low viscosity? HOT SPOTS! • Volcanic regions that are fed by the mantle below and are much hotter than the mantle in other parts of the world • Occur at divergent boundaries Convergent Boundaries: Subduction • Convergent boundaries form volcanic island arcs. These form over subduction zones • The plate that is subducted releases water into the overriding plate and causes some rock to melt • ex: Alaska volcanoes or Mt. St. Helens – cinder cones • http://www.youtube.com/watch?v=9Cx hOpk3J7Y Divergent BoundariesHot Spots • Divergent boundaries form hot spots – ex: Hawaiian islands and the RING OF FIRE – shield volcanoes, composite cones, etc. Anticipation Guide! Volcanoes also eject pyroclastic materials, • These particles can be as small as ash or as large as boulders. There are 3 main types of volcanoes, but they all have this general form: Shield Volcanoes • Made of very fluid lava that spreads really far and hardened. • Broad shape • Lots of island volcanoes (for example, Hawaii) • Eruptions are not very violent • Hot spot or subduction? Cinder cone volcanoes • Ejects lots of cinders (chunks of pyroclastic material) that accumulate at the bottom. • Steep sides • Short lifespans (usually only erupt once). • Usually pretty small • Hot spot or subduction? Composite cone volcanoes • Huge! • Produce both lava and pyroclastic material that can reach up to 120 mph! • Usually found in the Ring of Fire, which is a zone of volcanoes that circles the Pacific Ocean. • Can sometimes form lahars, which are mudflows that are made when lava mixes with water and soil. • Hot spot or subduction? Draw! Meet the Volcanos • http://video.pbs.org/vir • Complete concept map on the volcanos you met Calderas • Calderas are volcanic depressions that are created when the magma chamber is drained and the volcano collapses in on itself. Instead of looking like a mountain, it looks like a valley. Volcanic necks • Volcanic necks are formed when a volcano has been weathered down so that only the magma conduit (pipe) is left. Lava plateaus are made from very lowviscosity lava flowing out of a fissure (crack) in the ground. The lava spreads really far and creates a flat landform. Gallery Crawl and RAGE+C 1. Read the Mount Kilauea, HI article and complete response questions 2. Read the Mount Pinatubo, Philippines article and complete response questions 3. Read the CHALLENGE QUESTION and respond using RAGE+C 1. AT LEAST 8 SENTENCES!!! Volcanoes Around the World • http://www.bbc.co.uk/science/earth/natural_di sasters/supervolcano Using the materials at your desk, you have 6 minutes to draw all three types of volcanoes. Your diagrams must include: 1. Drawing of all three types in order from least violent to most violent. 2. Lable the main parts of each. (conduit, vent, crater, lava/pyroclastic material) QuickTime™ and a decompressor are needed to see this picture. EXIT TICKET 1. What is the relationship between the temperature of magma and its viscosity? The higher the temperature, the more or less viscous the magma. 2. Name the three types of volcanoes AND list them in the order of least to most violent. 3. What region of the world are the most violent volcanoes found? 4. Draw a diagram of a cinder cone volcano and lable the main parts (conduit, vent, crater, lava/pyroclastic material)