LAB 3 FINSIHED

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Georgia State University *

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113

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Geography

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Apr 3, 2024

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docx

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5

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Lab 3: Plate Tectonics GEOG 1113L – Introduction to Landforms Lab Name: _____________ I. The Saga of Supercontinents 1. What has driven the Earth’s advances and setbacks, explosions of life, and its extinction events? The movement of the continents and plate tectonics is caused by the earths setbacks and for front movements 2. What mid-20 th century discovery solidified the theory of continental drift? What is the significance of this feature? Underground mountain ranges in the sea which were discovered lead to the continental drift theory. This proves that mountain ranges are created through tectonic plate movement, 3. Another primary mechanism of plate tectonics is called ________, where oceanic crust slides under continental crust and begins to melt and mix with the mantle. subduction 4. Kenorland was one of the Earth’s first supercontinents that formed __________ years ago and was not much bigger than __________. -2.5-2.7 billion years – and austrailia 5. Which supercontinent existed at the same time as the Earth’s first animals? Did they live on the land? pannotia 6. How many supercontinents were mentioned in the video? 7 7. What caused the two major extinctions of Pangaea? Volcanic eruption pulletues the sun and bocks the sun 8. How fast are the continents moving? 2,5 cm a year
II. Plate Boundaries Open the PowerPoint “Lab 3 Part II_Plate Boundaries”. Read through the definitions and hints on the first slide of the PowerPoint. Draw at least two convergent boundaries and two divergent boundaries on the map using the “Draw” tab in the second slide of the PowerPoint. Make your divergent boundaries green and your convergent boundaries red . Draw arrows on each side of your boundaries to indicate which direction the plates are moving. Upload your completed PowerPoint activity along with your completed lab assignment document to the Lab 3 assignment submission folder on iCollege.
III. The Tectonic Cycle Use the diagram below to help you answer the question. 1. In your own words, describe the lifecycle of Earth’s tectonic plates. Be sure to use the labels in the image to help you provide as much detail as possible. When magma starts to move the plates start to move and separate. This creates mid ocean ridges. This then creates and forms oceans islands and igneous provinces. Then the plate sinking with the mantle becomes part of the magma.
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