Here's why:
* Density is a measure of how much mass is packed into a given volume.
* A denser object has more mass packed into the same space compared to a less dense object.
* Buoyancy is the upward force that a fluid (liquid or gas) exerts on an object submerged in it.
* The buoyant force is equal to the weight of the fluid displaced by the object.
* If an object is denser than the fluid, it will displace less fluid than its own weight. This means the buoyant force will be less than the object's weight, causing the object to sink.
Example: A rock is denser than water. When you drop a rock in water, it sinks because the water cannot exert enough buoyant force to support the rock's weight.
