directional lines
radial and concentric lines
Concentric lines
radial lines
none of the above
This has been answered before but there was no explanation given for the curve. Materials that do not have fracture planes such as glass and obsidian (a natural glass-like mineral) do not follow any particular structural arrangement when fracturing. The curve results from the distribution of stresses radiating from the fracture start point. The fracture pattern is called conchoidal.
Yes
Obsidian is a natural glass, often formed in volcanoes. It has a smooth glassy texture, and will commonly fracture with a curved fracture plane called conchoidal fracture, after the resemblance to the shape of a shell. Usually black because of the trace iron content.
Fracture.
Fracture.
greenstick fracture
No that is fracture.
conchoidal fracture (sea shell - like pattern)
Aluminums breakage pattern is Fracture.
Obsidian is a natural volcanic glass with potentially sharp fracture edges.
Fracture is when minerals are broke with an irregular. The pattern is not right.
internal fixation