Density

WHAT IS DENSITY?

• A material's density is defined as its mass per unit volume.

• a measurement of how tightly matter is packed together

WHAT WILL HAPPEN TO AN OBJECT PLACED IN WATER IF THE OBJECT’S DENSITY IS LESS THAN THE DENSITY OF WATER?

The object will float.

FORMULA FOR DENSITY :

D= m/v

UNITS FOR DENSITY :

The same units as mass and volume:

Kg/m³  …   g/cm³…g/liter

1.  What is the density of a piece of wood with a mass of 25.0g and a volume of 5cm³?

    5g/cm³

2.  A rectangular block of copper has a length of 2cm, a width of 2cm, and a height of 2cm.  If the mass of the block is 64g, what is its density?

8g/cm³

USING DENSITY TO IDENTIFY SUBSTANCES

Draw and color the liquid layers that form from the demonstration.