We can see that at mid-ocean ridges, mantle convection drives the upwelling of hot and less dense material from the asthenosphere, the upper part of the mantle. This upwelling creates a divergent boundary, where tectonic plates move away from each other. As the hot material rises, it forms a new oceanic crust through volcanic activity.
What is tectonic plate?Tectonic plates, also known as lithospheric plates, are large rigid pieces of Earth's lithosphere that fit together like a jigsaw puzzle to form the Earth's surface. The lithosphere is the outermost layer of the Earth, consisting of the crust and the uppermost part of the mantle. Tectonic plates are made up of both the Earth's crust and a portion of the upper mantle.
Mantle convection provides the driving force for the motion of the tectonic plates by generating the heat and circulation patterns within the Earth's mantle.
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