GENERAL KNOWLEDGE

Detailed explanation-1: -The asthenosphere is the denser, weaker layer beneath the lithospheric mantle. It lies between about 100 kilometers (62 miles) and 410 kilometers (255 miles) beneath Earth’s surface. The temperature and pressure of the asthenosphere are so high that rocks soften and partly melt, becoming semi-molten.

Detailed explanation-2: -The asthenosphere is considered weaker because it is warmer and has a lower viscosity than the lithosphere. Higher temperature of asthenosphere can be attributed to it being closer to the Earth’s core. Meanwhile, the lithosphere is strong and has very high viscosity.

Detailed explanation-3: -Beneath the lithospheric plates lies the ASTHENOSPHERE, a layer of the mantle composed of denser semi-solid rock. Because the lithospheric plates are less dense than the asthenosphere beneath them, they are floating on top of the asthenosphere.