Physical Science Handout Intro Unit: Measurement

Density

MASS VOLUME DENSITYDefinition The amount of

matter in an objectThe amount of space an object occupies

The amount of compactness of a substance

Units

g, kg cm3, or mL g/cm3 or g/mL

Methods to determine

Weigh on a triple beam balance

Formulas,Water displacement,Graduated cylinder

= m/V

Density of H2O (l) = 1.00 g/mL

(what about precision for density?)

Some common densities

Material Density (g/cm3)

Air 0.001Wood (oak)

0.710

Corn oil 0.925Water 1.00Plastic 1.17

Physical Science Handout Intro Unit: Measurement

Glycerol 1.26Rubber 1.34Corn syrup

1.38

Steel alloy

7.81

So, what will float in water?

Can the densities of materials change?

Density of a material can help identify the substance