Saturday, 2024-12-28
The daily puzzle:
What does '*****' mean in the following text?
"A ***** is an inorganic, nonmetallic solid prepared by the action of heat and subsequent cooling. ***** materials may have a crystalline or partly crystalline structure, or may be amorphous (e.g., a glass). Because most common *****s are crystalline, the definition of ***** is often restricted to inorganic crystalline materials, as opposed to the noncrystalline glasses, a distinction followed here."--++--++--
The answer and more (#)