Density

Density

What is it?

Density is a property of a substance that can be measured, and every substance has a different density. Density is the mass of the substance divided by the volume occupied by the substance.

Density is expressed in terms of units of mass per units of volume, such as grams per mililitre or pounds per square inch.

Give me an example!

Have you ever held a piece of lead in your hand? Did it feel really heavy for its size? That's because lead has a very high density compared to most substances. In other words, a specific volume of lead has a greater mass than a that same volume of another substance (say, salt).