SOLAR SYSTEM

Detailed explanation-1: -Magma is the molten rock below the crust, in the mantle. Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth’s crust.

Detailed explanation-2: -The inner most layer of earth is the core. The Earth is divided into 3 main layers. Crust (outermost), mantle and core (innermost).

Detailed explanation-3: -The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.

Detailed explanation-4: -The correct answer is option (d) Earth’s crust is divided into several large plates that do not move relative to each other.

Detailed explanation-5: -The correct answer is that the Continental crust is thicker than the oceanic one.