the elements of a rock cycle include,

  1. Igneous Rocks: Formed by cooled and crystallised magma
  2. Sedimentary Rocks: Formed by compaction of sediments
  3. Metamorphic Rocks: Formed by application of heat and pressure on sedimentary rocks
  4. Sediments: All rocks turn to sediments due to weathering

Lithification

compaction of sediments leading to sedimentary rock formation

Metamorphism

alterations within existing rocks under heat and pressure

Weathering

erosion of rocks

Melting

formation of magma