Question

Which element is found in both mantal and crust?
a. Silica
b. Magnesium
c. Aluminum

Answer 1

Solution:

Option A is the right answer. In other words, silica is the mineral that is found both in the mantle and crust.

It is the abundant mineral that is found in the earth’s surface.

These are available in the silicate ore which further can be extracted and transformed into different silica elements.

Answer 2

Answer:

The element that is found in "both mantle and crust" is "A. Silica".

Explanation:

The crust is mostly composed of Silica. More than "90% of the crust" is observed to contain silica. Silica is "Silicon dioxide" $SiO_2$, Silicon combined with oxygen. Silica exists in mainly three crystalline form – the quartz, the tridymite and the cristobalite. Besides, silica also occurs in the form of coesite, keatite, lechatelierite. Quartz is one of the "most common constituents" of rocks like granite.