Conceptual Meaning of Mass, Weight, Volume, & Density

MASS - Measures the Amount of Matter out of which a body is composed. (SI: kg)

WEIGHT - Measures the Force of Gravity that is being exerted on a body by the Earth. (SI: N)

VOLUME - Measures the Space Occupied by a body. (SI: m3)
Examples: Cube: Sphere: Cylinder:

DENSITY - Measures the Compactness of the Matter out of which a body is composed. (SI: kg/m3)

Definition:

Density of Some Materials
GASES
~ 1 kg/m3
LIQUIDS
~ 1000 kg/m3
SOLIDS
~10,000 kg/m3
Air (100C) 1.29 kg/m3 Water (200C) 998 kg/m3 Aluminum 2,700 kg/m3
CO2 (100C) 1.98 kg/m3 Olive Oil 915 kg/m3 Copper 8960 kg/m3
Helium (100C) .178 kg/m3 Mercury(00C) 13,595 kg/m3 Lead 11,300 kg/m3