Question

The lithosphere floats on the asthenosphere like glass on clay. When the clay moves, the glass moves. The movement of the lithosphere is _____.
seafloor spreading
plate tectonics
volcanic activity
earthquakes

Answer 1

Answer:

Option (2)

Explanation:

The lithosphere is the region that is comprised of the crust and a portion of the upper mantle. It is a region where all the essential minerals are present and also the living beings exist. It is made of rocks of variable composition. The lithosphere is made up of numerous large and small plates that are constantly in motion over the less dense asthenosphere layer, due to the convection current that generates in the mantle. This convection current initiates because of the heat radiated from the core of the earth.

Thus, this movement of the lithosphere is known as the plate tectonic movement.

Hence, the most appropriate answer is option (2).

Answer 2

The movement is kind like Earthquakes because at divergent boundaries, lithospheric plates move apart and crust is created. At convergent boundaries, lithospheric plates move together in collision zones where crust is either destroyed by subduction or uplifted to form mountain chains.

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