Lab 3 Assignment_Online

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Georgia State University *

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1113L

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Geography

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Apr 3, 2024

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docx

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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? - Movement of the Earth’s continents - 2. What mid-20 th century discovery solidified the theory of continental drift? What is the significance of this feature? - Mid-ocean ridges - 3. Another primary mechanism of plate tectonics is called subduction, where oceanic crust slides under continental crust and begins to melt and mix with the mantle. 4. Kenorland was one of the Earth’s first supercontinents that formed 2.5 to 2.7 billion years ago and was not much bigger than Australia. 5. Which supercontinent existed at the same time as the Earth’s first animals? Did they live on the land? - Pannotia existed at the time of the first animals. Fossils were discovered in coastal waters between the poles and the equator. 6. How many supercontinents were mentioned in the video? - Eight were mentioned. - 7. What caused the two major extinctions of Pangaea? - Volcanic eruptions - 8. How fast are the continents moving? - 2.5 centimeters 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.
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