What is the main difference between the two layers of the mantle?

Explanation: The difference between these two layers of the mantle comes from the predominant mineral phases in the rock. Both the upper and lower mantle consist primarily of silicate minerals. …

What is the difference between the upper mantle and lower mantle?

The upper mantle adjoins the crust to form the lithosphere, whereas the lower mantle never comes in contact with the crust.

What are the different mantle layers?

Earth’s mantle

• Earth’s mantle is a layer of silicate rock between the crust and the outer core. …
• 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 is the difference between the core mantle and crust?

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. At the center of the Earth is a hot, dense metal core.

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.

What are three differences between the upper and lower mantle apex?

They have the upper mantle and the 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 the main difference between the lithosphere and the asthenosphere?

Comparison of the Lithosphere and Asthenosphere

What is the difference between the lithosphere and the asthenosphere in which layer is each located?

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 is the difference between lithosphere and asthenosphere in relation to location in Earth structure?

The lithosphere (litho:rock; sphere:layer) is the strong, upper 100 km of the Earth. The lithosphere is the tectonic plate we talk about in plate tectonics. The asthenosphere (a:without; stheno:strength) is the weak and easily deformed layer of the Earth that acts as a “lubricant” for the tectonic plates to slide over.

How does the lithosphere differ from the asthenosphere quizlet?

How do the lithosphere and asthenosphere differ? The lithosphere differs from the asthenosphere because the lithosphere is the solid outer layer of the earth and the asthenosphere is below the mantle and made of slow flowing rock.

What is the main difference between oceanic crust and continental crust?

1. The oceanic crust is made up of basalt while the continental crust is made up of granite. 2. The oceanic crust is thinner while the continental crust is much thicker.

What is the difference between numerical dates and relative dates?

Distinguish between numerical and relative dates. Numerical dates specify the actual number of years that passed since an event, whereas relative dates determine the order of events in relation to one another.

What is the difference between numerical dates and relative dating quizlet?

Numerical dates specify an absolute age in number of years, whereas relative dates determine the order of events in relation to one another.

What is the major difference between relative dating and numerical dating techniques?

Unlike relative dating, which only tells us the age of rock A compared to rock B, numerical dating tells us the age of rock A in x number of years. If I told you that I was 30 years old, that number would be my numerical age. If I told you I was 32 years younger than my mother, that number would be my relative age.

What is the difference between relative age and numerical age?

Relative age is the age of a rock layer (or the fossils it contains) compared to other layers. It can be determined by looking at the position of rock layers. Absolute age is the numeric age of a layer of rocks or fossils.

What is the basic difference between relative and absolute dating quizlet anthropology?

What is the difference between absolute dating and relative dating? Absolute dating is the actual date of the rock and can also been known as radioactive dating. Relative dating is using the rock layers and fossil records to determine the age of the rock, and it is not the actual age of the rock.

What is the difference between relative time and absolute time?

Relative time is the physical subdivision of the rocks found in the Earth’s geology and the time and order of events they represent. Absolute time is the measurement taken from the same rocks to determine the amount of time that has expired.

What is the difference between an index fossil and a fossil assemblage?

An index fossil is an individual fossil used to correlate different rock layers of the same age; a fossil assemblage is a specific combination of fossils that is used to more precisely date a rock layer.

What characteristics do index fossils have?

index fossil, any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment. A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time.

How are index fossils used to correlate rock layers and determine the age of a rock?

Index fossils are commonly used to match rock layers in different places (Figure below). If two rock layers have the same index fossils, then they’re probably about the same age. Using Index Fossils to Match Rock Layers. Rock layers with the same index fossils must have formed at about the same time.

How are index fossils used to date rock layers?

Index fossils are fossils of organisms that lived during only one short period of time. A layer rock with an index fossil in it is close in age to another layer of rock with the same type of index fossil in it. Even though rock layers are of different regions, index fossils indicates that the layers are close in age.

Which best describes the relationship between rock layers and index fossils?

Which best describes the relationship between rock layers and index fossils? Different rock layers can be determined to be the same relative age if they contain the same index fossils.

Which statement accurately describes the rock layers?

The Layer 8 is older than layer 1 statement accurately describes the rock layers. Explanation: These layers are found in the sedimentary rocks and as per the layer one is younger than other layers and layers two and nine have the same relative ages of fossil deposits.