what does tectonic plates theory says?(class 9th)
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what does tectonic plates theory says?(class 9th)
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Answer:
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere.
The earth is considered to have 15 major tectonic plates. Seven of which are primary plates and the rest are secondary plates
Answer:
The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Thus, at divergent boundaries, oceanic crust is created.