# 1.04 Volume and density

Density

Density is the property of a substance. Each substance has is own specific density value. It is the mass per given volume. A volume of 1cm3 of water has a mass of 1g. The same volume of gold (1cm3) has a mass of 19,3g.

In order to be able to calculate the density you need to find the mass and the volume of an object.

Mass

The mass of an object can be found if you put it on a scale.

Volume

There are 2 ways you can measure the volume of an object.

- For a cube/rectangle you can use the formula V=length x height x width

- For an irregular shaped object you can use a measuring cylinder

The conversion of the volume from cubical into liter looks like this

You can use the following website to practice with the conversions of units.

https://eu.ixl.com/math/grade-8/convert-between-cubic-metres-and-litres (You need to create a free membership)

Calculation for density

Density has the unit g/cm3

Mass has the unit g

Volume has the unit cm3

The following video's are really good. Keep in mind that we don't use the d for density, but we use the scientific rho symbol

Websites to practice with density

https://serc.carleton.edu/mathyouneed/density/densitysp.html

https://www.ixl.com/science/grade-5/calculate-density