In certain materials, quartz glass is molded into specific shapes. for instance, quartz glass is often formed into a fibrous shape (fiberglass) that is commonly used in roofing shingles and ceiling tiles. what is the purpose of molding quartz into this fibrous shape, particularly for these 2 products? (hint: imagine what would happen if the glass in roofing shingles were made into rounded spheres instead of long fibers).