Simplify the following text for a Grade 6 native English-speaking person.
Original: The sedimentary rock can then be subsequently turned into a metamorphic rock due to heat and pressure , and the metamorphic rock can be weathered , eroded , deposited , and lithified , becoming a sedimentary rock . Sedimentary rock may also be re-eroded and redeposited , and metamorphic rock may also undergo additional metamorphism .
Simplified: Metamorphic rock is rock that has been changed .