Question

How are metamorphic tocks formed

Answer 1

They do not melt, but the minerals they contain are changed chemically, forming metamorphic rocks. Sometimes, metamorphic rocks are formed when rocks are close to some molten magma, and so get heated up. Remember that metamorphic rocks are not made from melting rock. (Rocks that do melt form igneous rocks instead.)

Answer 2

$\textbf{Metamorphic rocks}$

The word metamorphosis means change if form ingneous and sedimentary rocks change their form under very high temperature or pressure.

Such changed rocks are known metamorphic rocks. Metamorphic rocks are usually hard.

Example : marble, slate, etc.