Chemistry / Unit 1 Chem 0103 short lesson, about 20 seconds
Density Defined
Captions available
The idea
Density is the ratio of mass to volume, derived from the base units of mass and length.
In practice
A block of lead and a block of aluminum can be the same size yet have very different densities because their masses differ.
Where people slip
Density is intensive, not extensive — cutting a block of metal in half changes mass and volume equally, leaving density unchanged.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Something wrong in this lesson? Flag it · Sources for Chemistry