Which statement about the rock cycle is not true?
(1) Cementation is a process that
leads to sedimentary rocks.
(2) When heat is applied to a rock
and it melts, it may form a
metamorphic rock.
(3) A sedimentary rock in the future
may change into another type
of sedimentary rock.
(4) Solidification is always needed
to form an igneous rock.