* Mass: The total mass of the rock and the resulting lava remains the same. This is a fundamental principle of physics known as the law of conservation of mass.
* Elements: While the chemical bonds and arrangement of atoms change during melting, the individual elements within the rock are conserved. The lava will contain the same elements as the original metamorphic rock, just in a different form.
However, some things are not conserved:
* Minerals: The minerals that make up the metamorphic rock will break down and melt. The resulting lava will have different minerals, or may not have minerals at all, but will have the same elements as the original minerals.
* Structure: The metamorphic rock's structure, including its layers and textures, will be destroyed during melting. The lava will be a homogeneous fluid.
* Energy: The process of melting requires energy, which is typically supplied by heat from the Earth's interior. This means the lava will have more energy than the original metamorphic rock.
Therefore, while the mass and the elements are conserved, the minerals, structure, and energy of the rock are not conserved during the transformation into lava.
