A metamorphic rock that is melted and then re-solidified becomes which rock type?

• A. Igneous rock
• B. Sedimentary rock
• C. Metamorphic rock
• D. Clastic rock

Answer: (A)

When rock is melted and then cools and solidifies, it becomes igneous rock. The key idea is that melting creates a molten material (magma or lava), and as that liquid cools, minerals crystallize to form solid rock with interlocking grains. Whether it cools underground (intrusive) or erupts and cools rapidly at the surface (extrusive), the resulting rock is still igneous.

This isn’t metamorphic rock, which forms from existing rocks that are transformed by heat and pressure without melting, nor is it sedimentary rock, which forms from weathered fragments or mineral precipitates that are deposited, compacted, and cemented. Clastic rock is a type of sedimentary rock built from broken fragments, not from a melted-and-cooled state.