When we think of glass, we usually picture a hard, sharp, and transparent industrial material. However, in physics and chemistry, "glass" is not just the name of a material but also describes a specific state of matter .

1. Amorphous solid state

Most solids we encounter daily (such as salt, granulated sugar, or metals) have a crystalline structure—meaning their molecules are arranged in a neat, repeating geometric order.

Conversely, both lollipops and glass are amorphous solids . Their internal molecules are arranged in a chaotic, disordered manner, much like a liquid that has "frozen" before it can arrange itself.

2. The marvel of "Supercooling"

To make lollipops, the sugar solution is heated to a very high temperature (known as the hardening stage — around 145°C to 150°C) to evaporate almost all of the water.

• In glassmaking: Silica (sand) is melted and then cooled so rapidly that the molecules do not have enough time to form crystals.

• In lollipops: The melted sugar solution is rapidly cooled. Instead of recrystallizing into white sugar granules, the sugar molecules are "locked" into a disordered structure, creating the characteristic transparency and crisp texture.

3. Notable similarities in appearance

Have you ever noticed that lollipops and glass have almost identical properties?

• Brittleness: Both are hard but easily break when subjected to strong impact.

• Sharp cracks: When a lollipop breaks, its edges can be as sharp as shards of glass.

• Transparency: With no added coloring or air bubbles, cooked sugar has extremely high light transmittance.

Why are the other options incorrect?

• A. Plastics: Plastics are long-chain polymers. Although some plastics have an amorphous structure, their chemical bonding and formation process are completely different from the solidification process of sugar.

• C. Ice: Ice is a perfectly crystalline solid. The water molecules in ice are arranged in a highly ordered hexagonal lattice. When ice melts, it has a distinct transition point, unlike the gradual softening of sugar or glass.

• D. Rubber: This is a highly elastic material with twisted molecular chains that can be stretched. Lollipops, on the other hand, will break rather than deform when you try to bend them.

Conclusion

Next time you enjoy a lollipop, remember that you're essentially eating "sugar glass." It's a fascinating example of how chemistry isn't just in textbooks; it's present in the foods we love!