SOLAR SYSTEM

UNIVERSE

PLANETARY INTERIORS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
uppermost part of mantle and the crust for a ridge layer about 100km thick
A
lithosphere
B
asthenosphere
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Oceanic lithosphere is typically about 50-100 km thick (but beneath the mid-ocean ridges is no thicker than the crust). The continental lithosphere is thicker (about 150 km). It consists of about 50 km of crust and 100 km or more of the uppermost mantle.

Detailed explanation-2: -asthenosphere, zone of Earth’s mantle lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere. The asthenosphere extends from about 100 km (60 miles) to about 700 km (450 miles) below Earth’s surface.

Detailed explanation-3: -The lithosphere contains the crust and the uppermost part of the mantle. The lithosphere is broken into several irregularly shaped parts called lithospheric plates or tectonic plates.

Detailed explanation-4: -The lithosphere is composed of both the crust and the portion of the upper mantle that behaves as a brittle, rigid solid. The lithosphere is the outermost mechanical layer of the Earth. The lithosphere is about 100 kilometers thick.

There is 1 question to complete.