Answer:
Part 1.
Description:
It often has molten appearance due to its heterogeneous composition.
Rock or mineral:
It is a rock.
Mineral has a unique specific makeup and always has the same composition.
So it is rock due to heterogeneous composition.
Part 2.
Description:
Atoms in all specimens have the same structure and shape.
Rock or mineral:
It is Mineral.
Mineral has a unique specific makeup and always has the same composition.
Part 3.
Description:
It is generally found in crystalline form.
Rock or mineral:
It is a mineral.
Part 4.
Description:
Every specimen varies in terms of atomic structure.
Rock or mineral:
It is a rock.
A rock is a solid, inorganic, naturally-formed substance without a particular atomic structure or chemical composition.
