PPT-The composition of magma determines the characteristics of a volcanic eruption.

Section 2 Eruptions K What I Know W What I Want to Find Out L What I Learned Essential Questions How does magma type influence volcanic activity What is the role of pressure and dissolved gases in eruptions. Where do volcanoes occur—and why?. Divergent [MOR] boundaries . About 75% of erupted lava is found here. Basaltic magma; low viscosity, therefore it flows easily!. Oceanic crust ranges from about 2 km to 10 km thick. By: Jackson Smith. Type of Volcano. The Yellowstone caldera is a SUPERVOLCANO!. The Yellowstone Supervolcano is still very active, but is not shooting out lava. . It’s considered a Supervolcano because there is a much larger amount of magma in the magma chamber. . Volcanic. . Eruptions . (pages. . 209–216). Magma. . Reaches. . Earth’s. . Surface. (pages. . 210–211). Students will be able to….. Explain what happens when a volcano erupts.. Describe the two types of volcanic eruptions.. Chapter 9 . Section 1. Volcanic Eruptions. Volcanoes – areas of Earth’s surface through which magma and volcanic gases pass. In seconds a volcanic eruption can turn an entire mountain into a cloud of ash and rock. . . Here we will compare extrusive and intrusive volcanic features and action. q distinguish magma from lava. q identify intrusive and extrusive igneous features (e.g., sill, dike, . batholith. By Robbie Barker, Maximilian Bryson, and Brendan . P. etrili. What is a volcano. A volcano is an opening in the Earth’s surface through which magma rises.. Formation of volcanoes. 1.Most volcanoes occur at colliding boundaries.. Have your textbook on your desk and with it open to show your name.. Be ready for more note-taking today.. CHAPTER 9. Volcano . – are places on the surface of the earth that magma and volcanic gas are released. Youtube. :. Volcano Eruption – The Eruption of Mount St Helens 1980. 22 minutes. VOLCANOES. . Lithosphere. Side vent. Pipe. Central vent. Lava flows. Dike. Sill. Magma. chamber. Magma, which originates in the asthenosphere.... Learning Objective. : To be able to identify and describe the two different types of eruption. Effusive Eruptions…. Key Ideas:. Occur when hot, runny magma reaches surface. Gasses can escape more easily so less pressure builds up. Lesson Objective:. To be able to explain the cause, impacts and response of a volcanic eruption in an LIC. Characteristics of volcanoes. lava flow. Wind can blow ash a long way, which causes it to affect a large area by covering crops and roads; collapsing roofs because of the weight and suffocating animals and humans. . More than 2,000 years ago, Pompeii was a busy Roman city near the sleeping volcano Mount Vesuvius. People did not see Vesuvius as much of a threat. Everything changed when Vesuvius suddenly erupted and buried the city in a deadly blanket of ash that was almost 20 ft. thick!. Chapter 9 . Section 1. Volcanic Eruptions. During an eruption . magma. is forced to the Earth’s surface. Magma. – molten rock below the Earth’s surface. Lava – magma that . flows. on the Earth’s surface. Volcanoes. What are they?. Would you want to live near one?. The truth is…. Many types of eruptions are not the “explosive type” we . imagine…. Effusive eruption . .  . Explosive eruption. A volcano is an opening in Earth that erupts gases, ash, and lava.. Volcanic mountains form when layers of lava, ash, and other material build up around these openings.. 3 Basic Volcano shapes. Cinder Cone.