Tectonic Plates - What They Are & How They Work | Sea Floor Generation & Destruction (Middle School)

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** WHAT'S COVERED **
1. What tectonic plates are and how they move
An overview of the Earth's basic structure: the crust, mantle, and core.
The definition of tectonic plates and their slow, continuous movement.
The consequences of plate movements, including the formation of mountain ranges, the splitting of continents, earthquakes, and volcanic eruptions.
2. Evidence for plate tectonics
How ancient maps are created using rock and fossil evidence.
The role of fossil distribution (e.g., Mesosaurus) in demonstrating that continents were once connected.
How geological evidence, such as coal deposits in Antarctica, reveals past environments and supports the theory of plate movement.
3. The generation and destruction of the sea floor
The process of sea floor spreading at mid-ocean ridges, where new sea floor is generated.
The process of subduction at ocean trenches, where the sea floor is destroyed as it melts back into the mantle.
How these two processes work together to constantly renew and reshape the ocean floor.

** CHAPTERS **
0:00 Introduction
0:26 The Earth's Structure & Tectonic Plates
2:20 Evidence for Plate Tectonics
3:42 Sea Floor Spreading & Subduction
5:32 Outro


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