A rock that forms from an existing rock altered by heat, pressure, or chemical reactions is:

A rock that forms from an existing rock altered by heat, pressure, or chemical reactions is:

• A. Metamorphic Rock
• B. Igneous Rock
• C. Sedimentary Rock
• D. Magma

Answer: (A)

Metamorphic rocks form when an existing rock is transformed by heat, pressure, or chemically active fluids, while still staying solid. The conditions cause minerals to recrystallize and textures to re-align, creating new minerals stable under those higher temperatures and pressures. This is why shale can become slate, limestone can become marble, and granite can become gneiss—the original rock is altered into a new metamorphic form. Igneous rocks come from the cooling and solidification of molten material, either magma underground or lava at the surface. Sedimentary rocks form from weathered and eroded material that is deposited and cemented, or from minerals that precipitate from water. Magma is molten rock, not a rock itself.

Metamorphic rocks form when an existing rock is transformed by heat, pressure, or chemically active fluids, while still staying solid. The conditions cause minerals to recrystallize and textures to re-align, creating new minerals stable under those higher temperatures and pressures. This is why shale can become slate, limestone can become marble, and granite can become gneiss—the original rock is altered into a new metamorphic form. Igneous rocks come from the cooling and solidification of molten material, either magma underground or lava at the surface. Sedimentary rocks form from weathered and eroded material that is deposited and cemented, or from minerals that precipitate from water. Magma is molten rock, not a rock itself.