Reema has a piece of modeling clay that weighs 120 g. She first moulds it into a compact cube that has a volume of 60 cm³. Later, she flattens it into a thin sheet. Predict what will happen to its density.
The density of the clay will remain the same when it is flattened into a thin sheet.
The density of a substance is independent of its shape or size.
Since both the mass (120 g) and the volume (60 cm³) remain unchanged regardless of the shape, the density stays at 2 g/cm³.
Explanation
The chapter explicitly states on Page 7 that 'The density of a substance is independent of its shape or size.' When the clay is reshaped from a cube to a sheet, only its form changes—the amount of matter (mass) and the space it occupies (volume) remain constant. Therefore, density = mass/volume remains unchanged.
Solution Steps
The density of a substance is independent of its shape or size.
Both mass (120 g) and volume (60 cm³) remain unchanged when the clay is reshaped.
Density = mass/volume remains constant at 2 g/cm³.