Question

Which element is found in both mantle and crust?
(i) Silica
(ii) Magnesium
(iii) Aluminium
(iv) Iron

Answer 1

The materials common to existence in both the earth's mantle and the crust are magnesium and iron.

Silicon is not found, it is present in the form of silica in the earth's crust.

Aluminium, which is found in the mantle, does not exist right on the crust.

The mantle is rich mostly in silicate rocks.

Answer 2

Answer:

Silica is the most found in both mantle and crust

Explanation:

The constituent elements of the Mantle are 44.8 percent oxygen, 21.5 percent silicon, and 22.8 percent magnesium. Iron, aluminum, calcium, sodium, and potassium are also present. These elements are all linked together in the form of silicate rocks, which are all oxides.

The elements oxygen, silicon, aluminum, and iron account for 88.1 percent of the mass of the Earth's crust, while the remaining 11.9 percent is made up of 90 other elements. The majority of the mass in the Earth's crust is made up of oxygen.

The second layer of the crust is the oceanic crust. It is composed of silica and magnesium. It was previously known as Sima.

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