Question

Which among the following statement(s) is true about metamorphic rocks?

• A. They are formed when rocks change their original shape and form due to intense heat or pressure.
• B. Metamorphic rocks are formed by the accumulation of other eroded substances.
• C. Metamorphic rocks are formed when magma (or molten rocks) have cooled down and solidified.
• D. They are soft and have many layers as they are formed due to the deposition of sediments.

Answer 1

The correct option is A They are formed when rocks change their original shape and form due to intense heat or pressure.

Igneous rocks are formed by the cooling and solidification of magma (molten rock materials). Sedimentary rocks are formed by the accumulation of other eroded substances (sediments). Metamorphic rocks initially exist as igneous, sedimentary, or a metamorphic rock. They gradually transform from their igneous, sedimentary, or earlier metamorphic form when subjected to extreme heat and pressure. Such conditions are formed with the interaction of Earth's tectonic plates. The process of metamorphism does not melt the rocks, but instead transforms them into denser, more compact rocks.