**Activity 1.10**:

**Aim:**To investigate the relationship between the mass and density of various solids that have the same volume

**Materials and apparatus:**Copper cube, iron cube, cork cube and wooden cube that have the volume of 1 cm

^{3}each, water, basin, weighing balance.

**Instruction**

**1.**You are given four cubes that have the same volume as shown below.

**2.**Weigh the mass of each cube and calculate the density of each cube using the formula:

**3.**Record the value of mass and density in the table below.

**4.**Put the cubes into a basin of water. Observe whether they float or sink.

**Questions**

**1.**What is the relationship between mass and density if the volume of all the four solids is the same?

**2.**Arrange the above solids according to their density in an ascending order.

**3.**Based on the observation from step 4, state the operational definition of density.

**Answer**:

**1.**Density increases when the mass increases.

**2.**Cork → Wood → Iron → Copper

**3.**The operational definition of density is referring to the condition shown by objects which float or sink in water.