What is the difference between natural cracking and human-induced cracking of car glass?

[EvelynDella]

Car glass natural cracking and human-induced cracking are distinguished as follows: Differences in fragment area: Human-induced cracks tend to produce larger fragments due to external force impact, whereas natural cracks result in smaller fragments caused by internal stress without external force impact. Differences in impact marks: Examine the fragments for impact marks - human-induced breakage will show obvious impact traces on the glass fragments, while spontaneous glass breakage leaves much smaller marks. Additionally, tempered glass doesn't completely shatter into individual pieces when broken; many fragments remain connected, making them easier to identify.