Question

Granite is what kind of igneous rock, and how do you know?

a) Granite is an intrusive igneous rock, and this is evident from its coarse-grained texture.
b) Granite is an extrusive igneous rock, and this is evident from its fine-grained texture.
c) Granite is a sedimentary rock, and this is evident from its layering.
d) Granite is a metamorphic rock, and this is evident from its foliated structure.

Answer 1

Granite is an intrusive igneous rock, and this is evident from its coarse-grained texture. Option A is the answer.

Step-by-step explanation:

Granite is classified as an intrusive igneous rock, and this classification is based on its mode of formation. Intrusive rocks form beneath the Earth's surface from the cooling and solidification of molten magma. Granite specifically is composed mainly of quartz, feldspar, and mica, and it exhibits a coarse-grained texture due to the slow cooling process in the Earth's crust. The slow cooling allows larger mineral crystals to develop, creating the visible grains that characterize granite.

Options b, c, and d are incorrect because granite is not extrusive (formed on the Earth's surface), sedimentary (formed by the accumulation of sediments), or metamorphic (formed through alteration of existing rocks with heat and pressure).

Option A is the answer.