Question

The rock cycle is the process of formation of _______________.

• A. Sedimentary rock
• B. Metamorphic
• C. Igneous
• D. All of the above

Answer 1

Answer: (D)

• Rock cycle is the transition of rocks of 3 basic types viz igneous, sedimentary and metamorphic into each other in a cyclic manner.
  
• Primary rock is an igneous rock which is formed after solidification of lava. It may then get eroded and settled as various layers to form sedimentary rocks. The sedimentary rocks get metamorphosised under high pressure and temperature beneath the earth crust which forms metamorphic rocks.
• Finally, all types of rocks may get subducted deep inside the earth were under extreme temperatures they get melted leading to the formation of liquid magma and the cycle repeats.
• Thus all options are part of this cycle and option D is correct.