Density of specimen approximately 0.25 g/cm 3; scale in centimeters. Pumice /ËpÊmÉ¨s/ , called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals.It is typically light colored.Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls and being dark colored and denser. Pumice is created when super-heated, highly pressurized rock is violently ejected from a volcano.coria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls and being dark colored and denser. Pumice is created when super-heated, highly pressurized rock is violently ejected from a volcano.
They also denote whether the group is for men or women. Sororities are only for women. Fraternities are primarily for men, but less often, a fraternity can be for both men and women. Fraternities and sororities often have groups at many different schools. Each fraternity or sorority is given two or three Greek letters to call themselves, for example, Î±Ï (Alpha Phi) or Î±ÏÏ (Alpha Chi Omega). To tell the difference between groups at different schools, called chapters, each chapter is given another set of Greek letters.
Fraternization is used to describe a personal relationship between  an officer and an enlisted member that violates the customary  bounds of acceptable behavior in the Air Fâ¦orce. 2 people found this useful.