Density

An updated version of this page is now available containing the complete mass- volume- density module (including an online test assessment, and ideas for science projects) --
 

Take a look at the two boxes below. Each box has the same volume. If each ball has the same mass, which box would weigh more? Why?

The box that has more balls has more mass per unit of volume. This property of matter is called density. The density of a material helps to distinguish it from other materials. Since mass is usually expressed in grams and volume in cubic centimeters, density is expressed in grams/cubic centimeter.



We can calculate density using the formula:

Density= Mass/Volume
.



In the previous chapter you calculated the mass and volume of two blocks.


Block I

Mass = 79.4 grams

Volume=29.8 cubic cm.


Block II:

Mass= 25.4 grams

Volume=29.8 cubic cm.


Now Let's calculate the density for each block.

Please enter your answer for Block I in the space provided:


grams/cubic cm.
If you need a calculator one is available. Click on calculator in the left frame.



Please enter your answer for Block II:

grams/cubic cm.
If you need a calculator one is available. Click on calculator in the left frame.


Now let's find out what each block is made of.