Question

Put the igneous rocks in order from least silica content to greatest silica content.

Answer 1

Answer:

Option D. Mafic ➡ intermediate ➡ felsic

Explanation:

An Igneous rock is one of the major classification of rock that is found in the the crust of the Earth.

Their pattern of formation includes  cooling of molten rock, either intrusively (formed below the surface)  or (extrusively (formed on the earth surface).

Igneous rocks is observed to be a mineral that have abundance of silicates.

This silica content however became one of the early basis for its classifications and its still accepted today.

The borders of this scheme of classificatory below shows the order of decreasing silica content founds in the following igneous rocks ; felsic, intermediate, mafic, and ultramafic.

The question asks to put the igneous rocks in order from least silica content to greatest silica content; ultramafic, mafic, intermediate to

felsic.

From the options D. " Mafic ➡ intermediate ➡ felsic" is correct.

Answer 2

Answer:

Mafic --> intermediate --> felsic

Explanation:

Rocks are natural collection of minerals that solidifies together with time. They are mainly grouped into three namely,

- Sedimentary rock,

- Metamorphic rocks and

- Igneous rocks.

Igneous rocks are formed by cooling and solidification of magma from volcanic eruptions. It can be classified based on its chemical composition into the following types:

-Mafic: it is low in Silicate ( about 45%) example is basalt.

- intermediate: it contains 52- 63% silica, example is dacite.

- felsic: This has a very high silica content, example is granite