Question

The classification of rocks into igneous, sedimentary and metamorphic rocks is based upon ______.

Options

• Texture

• Origin

• Chemical composition

• Colour

Answer 1

The classification of rocks into igneous, sedimentary and metamorphic rocks is based upon origin.

Explanation:

Igneous rocks form from solidified magma or lava, sedimentary rocks form from sediments deposited by water or wind, and metamorphic rocks form from pre-existing rocks altered by heat and pressure. Hence, the classification depends on the rock’s origin, not texture, color, or chemical composition.