What is a safety feature of tempered glass?

• A. It breaks into round pieces with smooth edges
• B. It resists breaking and never shatters
• C. It shatters into sharp, jagged fragments
• D. It remains completely intact when struck

Answer: (A)

Tempered glass is heat-treated to put the outer surfaces into compression, which makes it much stronger than ordinary glass. If it does break, it shatters into many small, rounded fragments with dull edges instead of large, sharp shards. This reduces the risk of serious cuts and injuries, which is why this behavior is considered a safety feature. The other statements don’t fit this behavior—tempered glass can crack and break, it doesn’t stay completely intact, and it doesn’t produce sharp, jagged fragments when it fails.