Question

The name of the layer of the earth that separates the crust from the core is the ________ ?
A. Magma
B. Lithosphere
C. Mantle
D. Asthenosphere

Answer 1

Hint:There are three layers on Earth: the crust, the mantle, and the core. The crust is made of rocks and minerals that are solid. The mantle is below the crust, which is also mainly solid rocks and minerals, but punctuated by semi-solid magma malleable regions. A hot dense metal core is at the centre of the Earth.
Just as the crust's depth differs, so does its temperature. Hot in arid deserts and cold in ocean trenches, the upper crust resists the surface temperature of the atmosphere or ocean.

Complete answer:
The layers of the earth can be separated into lithosphere, asthenosphere, mesospheric mantle, outer core, and inner core (part of the mantle of the earth below the lithosphere and the asthenosphere).
A. Magma :- Magma is an extremely hot, liquid and semi-liquid rock below the surface of the Earth. Planet has a layered structure consisting of the inner core, mantle and crust of the outer core. Most of the mantle of the earth consists of magma. This magma may cause a volcanic eruption to pass through holes or cracks in the crust.

B. Lithosphere :-The crust and the uppermost mantle, which is the hard and solid outer layer of the Earth, form the Earth's lithosphere. It subdivides the lithosphere into tectonic plates.
The pedosphere is the uppermost portion of the lithosphere that chemically responds through the soil-forming phase to the atmosphere, hydrosphere, and biosphere.

C. Mantle :-A layer of silicate rock between the crust and the outer core is the Earth's mantle. It is 67 percent of the Earth's mass. It has a thickness of 2,900 kilometres (1,800 mi), which makes up about 84 percent of the volume of the Earth. It is mainly solid, but functions like a viscous fluid in geological time.
They are made of rock or ice and are usually the planetary body's largest and most massive sheet.

D. Asthenosphere :-The asthenosphere is the denser, weaker layer beneath the lithospheric mantle. It lies between 62 miles (about 100 kilometres) and 255 miles (410 kilometres) below the surface of the Earth. The asthenosphere's temperature and pressure are so high that rocks soften and partially melt, becoming semi-molten.

Hence the correct answer is option C.

Note:In order to measure its mass, the force exerted by Earth's gravity can be used. By tracking the movement of orbiting satellites, astronomers may also measure the Earth's mass.
The average density of the Planet can be calculated by gravimetric studies that have included pendulums historically. The Earth's mass is approximately 6 x 1024 kg.
The mantle is composed of iron and magnesium richer silicate rocks than the overlying crust. Although strong, the extremely hot silicate material of the mantle can flow over very long timescales. The movement of the tectonic plates in the crust is propelled by mantle convection.