Question

Granite rock is light in color. Which feature directly contributes to this color?

the process that forms granite
the amount of silica minerals in granite
the shape of the grains found in granite
the unique pattern formed by grains in granite

Answer 1

Option (2)

Step-by-step explanation:

Granite is a light coloured, coarse-grained, intrusive igneous rock with silica content more than 65%. This rock is formed when the hot intruding magma crystallizes and forms large crystals. These large crystals are formed due to the slow cooling of the magma beneath the surface of the earth. Since the amount of silica is very high in this rock, so they are considered as an acidic or felsic rock.

This rock is mainly comprised of quartz, feldspar, mica, amphiboles, and some other minerals. This a very hard and resistant rock.

Thus, the light color in granite is due to the presence of high silica content.

Hence, the correct answer is option (2).

Answer 2

The amount of silica minerals in granite

Step-by-step explanation:

Granite is an igneous rock with a very light color. Its grains are large and can be seen with unaided eyes. Granite mineral is basically composed of feldspar, Silica, Quartz along with minor amount of other elements like amphiboles and mica.

If we talk about the light color of granite, it is mainly due to large quantity of silica present in it, Infact granite is not always found in one color and can be white, gray or pink. But generally the light color is due to high silica content which makes it very clear and light.

Hope it helps!