Metamorphic rocks are formed when sedimentary, igneous, or older metamorphic rocks undergo physical (textural) or chemical changes that have caused by heat, pressure, or chemical reactions.
(Metamorphic rocks; are formed; T:when sedimentary, igneous, or older metamorphic rocks undergo physical (textural) or chemical changes) (sedimentary, igneous, or older metamorphic rocks; undergo; physical (textural) or chemical changes that have caused by heat, pressure, or chemical reactions) (physical (textural) or chemical changes; have caused; by heat, pressure, or chemical reactions)
Metamorphic rocks sedimentary, igneous, or older metamorphic rocks physical (textural) or chemical changes
are formed undergo have caused
T:when sedimentary, igneous, or older metamorphic rocks undergo physical (textural) or chemical changes
physical (textural) or chemical changes that have caused by heat, pressure, or chemical reactions
by heat, pressure, or chemical reactions