what do you mean by the theory of plate tectonics describe the movement of lithospheric plates and draw diagram from the NCERT book
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Answer:
What is plate tectonics?
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.
plate tectonics
The earth’s lithosphere is composed of seven or eight major plates and many minor plates. The lithosphere is a rigid outermost shell of earth and is broken up into tectonic plates. When these plates meet, their relative motion determines the type of boundary like convergent, divergent or transform.
Volcanic activity, earthquakes, mountain-building and oceanic trench formation occur along these plate boundaries. The relative movement of the plates typically ranges from zero to 100 mm annually.
Causes of Plate Tectonics:
Plate tectonics affects humans in several important ways.
It causes earthquakes
It causes volcanism
It induces recycling of elements within the biosphere and between the geosphere and biosphere
It causes mountain-building