Throughout history, volcanoes have killed millions of people and caused billions of dollars worth of damage. They could erupt at any time so they unpredictable and dangerous. Scientists are working all over the world to learn about these devastating yet awesome landforms.
VolcanoFormation / Diagram / How Volcano Forms / Type of Boundary
Where Volcano Forms
Island
Arc / / These volcanoes form when two oceanic plates converge. The plate that is subducted begins to melt into magma. The magma rises up through the crust to form an arc of volcanic islands. / Convergent between two oceanic plates.
Continental
Arc / / These volcanoes form when an oceanic plate is subducted under a continental plate. The oceanic plate begins to melt into magma. The magma rises through the crust to form an arc of volcanic mountains. / Convergent boundary between an oceanic plate and a continental plate.
Hot Spot / / These volcanoes form over a super heated magma plume that forms in the middle of plates. As the plate moves, the Hot Spot burns through the crust to make a new volcano. / Forms in the middle of tectonic plates.
Rift
Zone / / These volcanoes form at divergent boundaries. As two plates diverge, they create a weak spot in the crust that allows magma to rise up through to become a volcano. Sea-floor spreading at mid-ocean ridges is an another example. / Forms at a divergent boundary on land. Could also form at divergent boundaries on the ocean floor (mid-ocean ridges)
Complete the chart below by researching the different ways volcanoes form. There are different volcanoes according to the types of plate boundaries where they form.
Use the Plate Tectonic Map below to answer the questions
1. What type of volcano would you find at location 5? Explain This would be a Hot Spot volcano because it is forming in the middle of a plate.
2. What type of volcano would you find at location 6? Explain This would be an island arc volcano because it is a convergent boundary between two oceanic plates and you can see the arc of islands that has formed.
3. What type of volcano would you find at location 4? Explain This would be a continental arc volcano because it is a convergent boundary between an oceanic and continental plate. An arc of volcanoes along the West coast of S. America would form.
4. What type of volcano would you find at location 7? Explain This would be a volcano at a mid-ocean ridge or rift zone volcano because it is forming at a divergent boundary in the middle of the Pacific Ocean.
Cut these diagrams out and paste them in the correct position in the chart above.
Cut these diagrams out and paste them in the correct position in the chart above.