Erosion, deposition, compression ist the THREE major rock types that make up the Earth's crust. (3 x 1) (3) ow can one distinguish between igneous rock and sedimentary rock with le naked eye? (2x 1) ) iefly explain how igneous rock and sedimentary rock can be changed to metamorphic rock. (2 x 2) itline how metamorphic rocks can be changed back into sedimentary ck (2x2) Je ONE way in which humans can make use of metamorphic rock, (1 x 2) (2)