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Questions and Answers
What is the main evidence supporting the Continental Drift theory?
What is the main evidence supporting the Continental Drift theory?
Which theory is based on the discovery that the Atlantic Ocean seafloor is spreading?
Which theory is based on the discovery that the Atlantic Ocean seafloor is spreading?
What type of boundary occurs when two plates collide?
What type of boundary occurs when two plates collide?
What drives the movement of tectonic plates according to the text?
What drives the movement of tectonic plates according to the text?
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What evidence led to the development of Plate Tectonic Theory according to the text?
What evidence led to the development of Plate Tectonic Theory according to the text?
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What type of convergent boundary is formed when an ocean plate collides with a continental plate?
What type of convergent boundary is formed when an ocean plate collides with a continental plate?
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What surface features are formed when two continental plates collide at a convergent boundary?
What surface features are formed when two continental plates collide at a convergent boundary?
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At which type of convergent boundary do island arcs appear on the overriding plate when seafloor volcanoes reach heights above sea level?
At which type of convergent boundary do island arcs appear on the overriding plate when seafloor volcanoes reach heights above sea level?
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What type of boundary is formed when two plates move apart and new ocean floor is formed?
What type of boundary is formed when two plates move apart and new ocean floor is formed?
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What surface features are formed along transform boundaries?
What surface features are formed along transform boundaries?
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Study Notes
Continental Drift Theory
- Main evidence includes the fit of South America and Africa, fossil similarities, and geological similarities across continents.
- The discovery of matching rock formations and fossil records across distant continents indicates historical connections.
Seafloor Spreading
- The theory of seafloor spreading is based on the discovery of the Atlantic Ocean's spreading floor, which shows new crust formation at mid-ocean ridges.
Plate Boundaries
- A convergent boundary occurs when two tectonic plates collide, leading to various geological features, like mountain ranges or deep ocean trenches.
Driving Forces of Plate Movement
- Plate movement is driven by mantle convection, gravity, and the Earth's internal heat, causing the tectonic plates to shift.
Development of Plate Tectonic Theory
- Evidence for Plate Tectonic Theory includes the distribution of earthquakes and volcanoes, patterns of seafloor spreading, and magnetic striping on the ocean floor.
Types of Convergent Boundaries
- An oceanic-continental convergent boundary forms when an ocean plate collides with a continental plate, leading to subduction and the formation of mountain ranges or volcanic activity.
Surface Features from Continental Collisions
- When two continental plates collide at a convergent boundary, they create extensive mountain ranges due to the uplift and folding of crust.
Island Arcs Formation
- Island arcs appear at oceanic-oceanic convergent boundaries when subducting seafloor volcanoes rise above sea level, forming volcanic islands.
Divergent Boundaries
- A divergent boundary forms when two plates move apart, resulting in the creation of new ocean floor through volcanic activity at mid-ocean ridges.
Features of Transform Boundaries
- Surface features along transform boundaries can include fault lines and earthquakes, as tectonic plates slide past each other without creating or destroying crust.
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Description
Test your knowledge about plate tectonics and continental drift theory with this quiz. Learn about Alfred Wegener's continental drift theory, the evidence supporting plate tectonic theory, and the changes in Earth's surface.
