GEOLOGY

EARTH SCIENCE

TECTONICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Scientists have identified five physical layers that compose Earth. Which layer is the slow-flowing lower part of the mantle?
A
outer core
B
lithosphere
C
mesosphere
D
asthenosphere
Explanation: 

Detailed explanation-1: -The mesosphere is beneath the asthenosphere . It encompasses the lower mantle, where material still flows but at a much slower rate than the asthenosphere. A layer of liquid iron and nickel (and other elements) beneath the mesosphere.

Detailed explanation-2: -The asthenosphere is a layer of weak or soft mantle that is made of rock that flows slowly. Tectonic plates move on top of this layer. The strong, lower part of the mantle is called the mesosphere. Rock in the mesosphere flows more slowly than rock in the asthenosphere does.

Detailed explanation-3: -The mantle that surrounds the core is made of solid material that can flow very slowly. The upper portion of the mantle is a weak layer called the asthenosphere, which can deform like plastic.

Detailed explanation-4: -lithosphere The upper layer of Earth, which includes its thin brittle crust and upper mantle. The lithosphere is relatively rigid and is broken into slowly moving tectonic plates.

Detailed explanation-5: -The lower level of the mantle is called the asthenosphere and it is softer and weaker, particularly in its upper portion where a small amount of melting can occur.

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