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silicon
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The mantle has less aluminum and less what than the crust does?
The mantle has less aluminum and less silicon than the crust does.
The mantle has less aluminum and less?
The mantle has less aluminum and silicon than the crust does.
The mantle is denser than the crust because it contains more what?
The mantle is denser than the crust because it contains more iron and magnesium-rich minerals. These minerals have a higher density compared to the minerals found in the crust, such as silica and aluminum.
What has less density--the crustal rocks or the mantle rocks?
Crustal rock is normally less dense than mantle rock.
Why would a thickness of continental crust displace less mantle than the same thickness of oceanic crust?
Continental crust is generally thicker and less dense than oceanic crust, which is denser and thinner. When continental crust is added or displaced, it exerts less force on the underlying mantle due to its buoyancy, resulting in less mantle displacement. In contrast, the denser oceanic crust displaces more mantle when submerged or altered, leading to a greater effect on the mantle beneath it. This difference in density and buoyancy explains why the same thickness of continental crust displaces less mantle than oceanic crust.
Why does Earth's crust sit on top of the mantle?
The crust lies on top of the mantle because it is composed of less dense materials than the mantle is. The crust is essentially floating on the mantle.
If continental crust were thinner than its average thickness of 40km would it depress the mantle more or less than it does now?
If continental crust were thinner than its average thickness of 40km, it would depress the mantle less than it does now. This is because less mass in the thinner crust would exert less pressure on the mantle, resulting in less depression.
The crust floats on the mantle because?
the crust(~2.7g/cm3) is less dense than the mantle(~3.3 g/cm3)
Why doesnt the crust fall into the mantle and burn up?
the crust is lighter and less dense than the mantle...thus it floats on top.
What is the lightest layer on earth?
The lightest layer of the Earth is the crust, which is primarily composed of lighter materials such as silicates and aluminum-rich minerals. It is less dense than the underlying mantle and core, allowing it to float on the more viscous layers below. The oceanic crust is generally thinner and denser than the continental crust, but both are significantly lighter than the mantle and core.
Why would a certain thickness of continental crust displace less of the mantle than the same thickness of oceanic crust?
Continental crust is less dense than oceanic crust, so it floats higher on the mantle. This means that the same thickness of continental crust will displace less mantle compared to oceanic crust. Additionally, continental crust is composed of lighter rocks like granites, while oceanic crust is made of denser rocks like basalt.
Ocean crust is denser than the continental crust because it contain more of which 3 element?
Ocean crust is typically denser than continental crust because it contains more basalt (rich in iron and magnesium), whereas continental crust is composed of less dense granite (richer in aluminum and silicon).
