## Density

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:

*If you need a calculator one is available. Click on calculator in the
left frame.*

Please enter your answer for Block II:
*If you need a calculator one is available. Click on calculator in the
left frame.*