How are the two layers of the mantle different?
The lower mantle is hotter and denser than the upper mantle and transition zone. The lower mantle is much less ductile than the upper mantle and transition zone. Although heat usually corresponds to softening rocks, intense pressure keeps the lower mantle solid.
What is the difference between the Mantle’s upper zone and lower zone?
The upper mantle adjoins the crust to form the lithosphere whereas the lower mantle never comes in contact with the crust. …
What is the difference between the two layers of the mantle the asthenosphere and the mesosphere?
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.
Does the mantle contain two different layers?
The mantle can be further divided into the upper and lower mantle (also known as the mesospheric mantle), with the upper mantle containing two distinct regions: the asthenosphere and the lower portion of the lithosphere. The lower mantle refers to the layer between the outer core and asthenosphere.
What is the difference between the upper mantle and lower mantle?
There are very small differences between the two layers. The upper mantle has Olivine (a very special rock), compounds with silicon dioxide, and a substance called Peridotite. The lower mantle is more solid than the upper mantle.
What is upper mantle and lower mantle?
The lower mantle is located approximately 400 to 1,800 miles below the surface. This layer is located directly above the outer core and contains solid rock that is around 7,000° F in temperature. The upper mantle surrounds the lower mantle and consists of a combination of solid and molten rock.
How is the lower mantle different from the asthenosphere?
The Asthenosphere is made up of semi-plastic rock. Since the Lithosphere has a lower density, it floats on top of the Asthenosphere similar to the way in which an iceberg or a block of wood floats on water. The lower mantle below the Asthenosphere is more rigid and less plastic. Below the Mantle is the outer core.
What is the main difference between the crust and the mantle?
The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma.
What are the two parts of the mantle?
Earth's mantle is divided into two major rheological layers: the rigid lithosphere comprising the uppermost mantle, and the more ductile asthenosphere, separated by the lithosphere-asthenosphere boundary.
What are the two main sections of the mantle?
Parts of the Mantle
| Mechanical layer | General Layer | Depth Below Earth's Surface |
|---|---|---|
| Lower Lithosphere | Lithospheric Mantle | 35-80 kilometers |
| Asthenosphere | – | 80-220 kilometers |
| Mesospheric Mantle | Transition Zone | 220-670 kilometers |
Sep 29, 2021
Which statement describes a difference between the lower mantle and oceanic crust?
Which statement describes a difference between the lower mantle and oceanic crust? The lower mantle experiences more pressure than oceanic crust does.
What is the characteristics of lower and upper mantle?
The lower mantle is located approximately 400 to 1,800 miles below the surface. This layer is located directly above the outer core and contains solid rock that is around 7,000° F in temperature. The upper mantle surrounds the lower mantle and consists of a combination of solid and molten rock.
What’s the difference between mantle and mantle?
In modern usage, mantel refers to a shelf above a fireplace and mantle refers to a cloak or covering. "Mantle" is also used metaphorically when describing the transfer of power such as when one "takes on the mantle." Some still identify these words as spelling variants, but you are better off separating them.
How is the crust different from the mantle quizlet?
The continental crust is thicker and less dense, and is similar to granite in composition (Si, O, Al, K, and Na). The mantle is made of magnesium, iron and silicon. The core is almost exclusively iron and nickel. The outer core is liquid iron and the inner core is solid iron.
What are the two most important things about the mantle?
Most kimberlites surfaced long ago. The two most important things about the mantle are as follows: It is made of semi-solid rock. It is hot.
What are the different layers of the Earth?
The structure of the earth is divided into four major components: the crust, the mantle, the outer core, and the inner core. Each layer has a unique chemical composition, physical state, and can impact life on Earth's surface.
What is the difference between continental crust and oceanic crust?
What is the difference between Oceanic and Continental Crust? Oceanic crust is dominated by mafic and ultramafic intrusive igneous rocks whereas continental rocks are dominated by granitic (felsic) intrusive igneous rocks.
Which statement describes a difference between the lower mantle and oceanic crust quizlet?
Which statement describes a difference between the lower mantle and oceanic crust? The lower mantle experiences more pressure than oceanic crust does.
Which describes the difference between continental and oceanic crust chemical composition?
Continental crust is broadly granitic in composition and, with a density of about 2.7 grams per cubic cm, is somewhat lighter than oceanic crust, which is basaltic (i.e., richer in iron and magnesium than granite) in composition and has a density of about 2.9 to 3 grams per cubic cm.
What is mantle made of?
The mantle is made up of a semi-molten rock called magma. The mantle can be split into two different sections which consist of the lower mantle, which is made from a more solid rock, which is hot enough to melt but stays solid due to the pressure pushing onto it.
Is the mantle solid or liquid?
The Earth's mantle is mostly solid from the liquid outer core to the crust, but it can creep on the long-term, which surely strengthens the misconception of a liquid mantle. Courtesy of the U.S. Geological Society.
What is the difference between oceanic crust and continental crust?
What is the difference between Oceanic and Continental Crust? Oceanic crust is dominated by mafic and ultramafic intrusive igneous rocks whereas continental rocks are dominated by granitic (felsic) intrusive igneous rocks.
What is the difference between lithospheric mantle and asthenosphere quizlet?
The lithosphere and the asthenosphere are both parts of a mantle and parts of the interior earth. The lithosphere is the hard and rigid uppermost part of the mantle and crust. The asthenosphere is the soft layer in the lower part of the mantle.
What is the difference between the continental crust and the oceanic crust?
Continental crust is typically 40 km (25 miles) thick, while oceanic crust is much thinner, averaging about 6 km (4 miles) in thickness. The effect of the different densities of lithospheric rock can be seen in the different average elevations of continental and oceanic crust.
How are layers of the Earth different?
The inner core is solid, the outer core is liquid, and the mantle is solid/plastic. This is due to the relative melting points of the different layers (nickel–iron core, silicate crust and mantle) and the increase in temperature and pressure as depth increases.
What’s the difference between oceanic and continental plates?
Continental plates are much thicker that Oceanic plates. At the convergent boundaries the continental plates are pushed upward and gain thickness. The rocks and geological layers are much older on continental plates than in the oceanic plates. The Continental plates are much less dense than the Oceanic plates.
What is the difference between oceanic and continental?
What is the difference between Oceanic and Continental Crust? Oceanic crust is dominated by mafic and ultramafic intrusive igneous rocks whereas continental rocks are dominated by granitic (felsic) intrusive igneous rocks.
What describes a difference between the lower mantle and oceanic crust?
Which statement describes a difference between the lower mantle and oceanic crust? The lower mantle experiences more pressure than oceanic crust does.
Which statement describes how the mantle is similar to Earth’s oceanic crust?
The lower mantle experiences more pressure than oceanic crust does. Which statement describes how the mantle is similar to Earth's oceanic crust? C. It has varying degrees of thickness.
What is the difference between the lower mantle and oceanic crust?
Which statement describes a difference between the lower mantle and oceanic crust? C. The lower mantle experiences more pressure than oceanic crust does.