* Density: Density is a measure of how much mass is packed into a given volume. Water has a density of about 1 gram per cubic centimeter (g/cm³).
* Buoyancy: When an object is submerged in a fluid (like water), it experiences an upward force called buoyancy. This force is equal to the weight of the fluid displaced by the object.
* Floating: If an object's density is lower than the fluid it's in, it will displace a volume of fluid that weighs more than the object itself. This means the buoyant force acting on the object is greater than its weight, causing it to float.
Example: A piece of wood has a lower density than water. When you put it in water, it displaces a volume of water that weighs more than the wood itself. This buoyant force pushes the wood up, causing it to float.
