A continual process in which a rock is changed into another rock is called- Classification of rocks
O Accumulation
O Sedimentation
O Rock Cycle

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

not always but somethings can be reproduced in a laboratory.