Simple: The bone fracture does not break the skin
Compound: when the bone punctures the skin
Incomplete: the bone does not break completely
Impact: The bone fracture impacts another bone
Comminuted: The bone breaks into 3 or more pieces
I believe the answer is true because we spill liquids during these events causing more erosion
Several factors affect the rate at which enzymatic concentration, substrate concentration, and the presence of any inhibitors or activators
So other scientists can try the exact same experiment and see if they both got the same results.