SSC MTS EXAM

Detailed explanation-1: -The theory of plate tectonics revolutionized the earth sciences by explaining how the movement of geologic plates causes mountain building, volcanoes, and earthquakes.

Detailed explanation-2: -Plate Tectonics (definition) (Illustrated in Figure 3.25.) A theory that states that the earth’s solid outer shell (lithosphere) broken into large, rigid pieces called plates that can move relative to each other by sliding atop the non-solid asthenosphere.

Detailed explanation-3: -The system of ideas behind plate tectonics theory suggests that Earth’s outer shell (lithosphere) is divided into several plates that glide over the Earth’s rocky inner layer above the soft core (mantle). The plates act like a hard and rigid shell compared to Earth’s mantle.

Detailed explanation-4: -Plate tectonics is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth’s lithosphere (crust and upper mantle), since tectonic processes began on Earth between 3.3 and 3.5 billion years ago.