Both the lithosphere and asthenosphere are part of Earth and are made of similar material . Lithosphere is made up of Earth’s outermost layer, the crust, and the uppermost portion of the mantle. ... The asthenosphere is more dense and viscous in comparison to the lithosphere.
How are the lithosphere and the asthenosphere similar quizlet?
The lithosphere is the tectonic plate and consists of crust (continental and oceanic), Moho line, Upper Mantle Rigid. The asthenosphere is where the convection currents drive the plates apart and consist of Upper Mantle flowing. ... They drive the divergent and subduction to move the tectonic plates.
What is the connection between asthenosphere and lithosphere?
The rocks above the asthenosphere, being the uppermost mantle plus the overlying crust (either continental or oceanic) behave mechanically as one, and comprise what geologists call the ‘lithosphere’. The lithosphere moves as one over the weaker, plastic asthenosphere .
Do lithosphere and asthenosphere have the same physical properties?
Summary. The lithosphere is the brittle crust and uppermost mantle. The asthenosphere is a solid but it can flow , like toothpaste. The lithosphere rests on the asthenosphere.
What makes up the lithosphere and asthenosphere?
The lithosphere is the solid, outer part of the Earth. The lithosphere includes the brittle upper portion of the mantle and the crust , the outermost layers of Earth’s structure. It is bounded by the atmosphere above and the asthenosphere (another part of the upper mantle) below.
What is an interesting fact about the asthenosphere?
The asthenosphere is the region of the upper earth considered to be mechanically weak . It sits below the lithosphere, reaching from 50 miles to 120 miles below the earth’s surface. The boundary where the lithosphere and asthenosphere meet is referred to as the LAB.
What are the 2 types of plates?
There are two types of plates, oceanic and continental .
What is the biggest difference between the asthenosphere and lithosphere?
Main Differences Between Lithosphere and Asthenosphere
The lithosphere consists of the earth’s crust and the uppermost solid layer of the mantel. But asthenosphere consists of only the uppermost weakest layer of the mantel. ... The lithosphere is elastic due to the crust and the tectonic plates being a part of this layer.
What are 3 ways the asthenosphere is different from the lithosphere?
| Lithosphere Asthenosphere | Has a lower density than the asthenosphere Asthenosphere is denser than the lithosphere | Allows for conductive heat transfer Allows for advective heat transfer |
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What are the two most important driving forces of metamorphism?
Pre-existing rocks undergo metamorphism when they are subjected to heat and pressure without melting . The presence of fossils in pre-existing rocks leads to the development of metamorphic rocks. Pre-existing rocks undergo metamorphism when they are subjected to heat and pressure without melting.
What is an example of asthenosphere?
The upper layer of asthenosphere under the South American plate , for example, is moving inexorably westward. ... The plates constitute the hard lithosphere – literally, ‘sphere of rock’ – which floats atop the hot, semi-molten asthenosphere – ‘sphere of weakness’.
What are the elements of the asthenosphere?
The elements in the asthenosphere are magnesium, silicon, iron and oxygen .
Is the asthenosphere solid or liquid?
2. Asthenosphere –The asthenosphere is made of very viscous, ductile, semi-solid material on which the lithosphere moves. It is a solid that can behave like a liquid , and it is about 440km thick.
How does the asthenosphere affect the lithosphere?
Convection currents also stress the lithosphere above, and the cracking that often results manifests as earthquakes. According to the theory of plate tectonics, the asthenosphere is the repository for older and denser parts of the lithosphere that are dragged downward in subduction zones.
What is the color of lithosphere?
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Which is the deepest point in the lithosphere?
The deepest point on the lithosphere is Mariana Trench in the Pacific Ocean ...
