Kısaca
Glass looks solid but its atoms are not ordered like a crystal. It is amorphous, like a liquid arrangement frozen in place.
The smooth surface and hardness make glass feel like a classic solid. But inside, you do not find neat crystal lattices, you find a more disordered structure.
Glass solidifies from a melt, yet it does not have time to crystallize. Atoms get locked into a random arrangement similar to a liquid.
This amorphous structure influences behavior from optical clarity to brittleness. The same principle can be used in modern materials by rapid cooling to reach new properties.
Thinking this way teaches that even solids come in varieties. Materials science reveals the invisible architecture behind everyday objects.