Low Density
Readily Compressible
Almost incompressible (also)
Indefinite Shape (also)
High Density
Medium Density
Indefinite Volume
Definite Volume (also)
Free-flowing? Yes
Close, But Not Tight Particles
Indefinite Shape
Free-flowing? No
Almost incompressible
Definite Volume
Spaced Far Apart Particles
Tightly Packed Particles
Free-flowing? Yes (also)
Definite Shape
