Glass is a hard, amorphous material made by melting silicon dioxide, calcium oxide, and sodium oxide at very high temperatures.

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Quizplus · Accepted Answer

Glass is indeed a hard, amorphous material created by melting together silicon dioxide (SiO2), calcium oxide (CaO), and sodium oxide (Na2O), among other ingredients, at high temperatures. This process results in a non-crystalline, or amorphous, solid that is commonly used in windows, bottles, and many other products.

Glass Is a Hard, Amorphous Material Made by Melting Silicon