Density = Mass / Volume

Density is a fundamental property of matter, defined as the amount of mass in a unit volume of a substance.
To calculate density, you use the formula: Density = Mass/Volume.
Mass refers to the amount of matter in an object, typically measured in kilogrammes (kg).
Volume refers to the amount of space that an object occupies, usually measured in cubic metres (m^3) or cubic centimetres (cm^3).
If an object has a higher density than a fluid, it will sink in that fluid. If an object has a lower density than a fluid, it will float.
Changing the temperature of a substance can change its density. Generally, as temperature increases, volume also increases and therefore density decreases.
Pressure can also affect the density of gases. Increasing pressure raises the density as it decreases the volume.
Density is important in understanding fluid dynamics and buoyancy, the principle that explains why some objects float while others sink.
The denser an object is, the less likely it is to float.
In terms of energy, density plays a significant role in conduction and convection currents. High-density materials usually conduct heat better than low-density ones.