Question-based on the iron of earth I have tried it but unable to get right. Overall, iron is the Earth's most abundant element. However, most of the crustal rocks are silicates, SiO4, with minor amounts of iron.What, then, accounts for the large proportion of iron?353025201510IronOxygenSilicon Magnesium NickelSulfurCalcium Aluminum OtherProportion of elementsSealevel150 kmCrust410 km660 kmUppermantleTransition zoneLowermantle2,900 kmOutercore5,155 kmInnercore,6,371 kmPercentage Choose one:O A. Major amounts of dissolved iron ions in ocean waters.O B. Iron is almost always a component of silicate rocks.O . Mantle rocks are primarily iron.O D. The inner and outer core is 94% iron, and the volume of the core is much greater than that of the crust.

Answered: Overall, iron is the Earth's most…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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Question-based on the iron of earth

I have tried it but unable to get right.

Overall, iron is the Earth's most abundant element. However, most of the crustal rocks are silicates, SiO4, with minor amounts of iron.
What, then, accounts for the large proportion of iron?
35
30
25
20
15
10
Iron
Oxygen
Silicon Magnesium Nickel
Sulfur
Calcium Aluminum Other
Proportion of elements
Sea
level
150 km
Crust
410 km
660 km
Upper
mantle
Transition zone
Lower
mantle
2,900 km
Outer
core
5,155 km
Inner
core,
6,371 km
Percentage

Choose one:
O A. Major amounts of dissolved iron ions in ocean waters.
O B. Iron is almost always a component of silicate rocks.
O . Mantle rocks are primarily iron.
O D. The inner and outer core is 94% iron, and the volume of the core is much greater than that of the crust.

Expert Solution

Step 1

Earth

The earth consists of three layers, the crust, mantle and the core. The crust is the hard, brittle and solid upper most layer. Silicates are the most abundant materials found in the crust. Crust comprises only less than $1 ℅$ of total volume of the earth.

Mantle is the second layer of the earth. Its average thickness is about $2900 km$ . It alone comprises about $84 ℅$ of earth's total volume. Its main rocks of the layer are silicates followed by magnesium oxide and others.

Core is the inner most layer with highest density and temperature. Its main elements are iron and nickel.