Displacement of Water (Archimedes' Principle)

Understand how the volume of water displaced equals the volume of the submerged object to demonstrate buoyancy principles.

What you need

• A small solid object (like a stone or metal bolt)
• A measuring jar or a clear container with volume markings
• A transparent overflow can or another container
• Water
• A bowl to collect overflow water

How it works

When the object is submerged, it pushes water out of the container. The amount of water displaced is equal to the volume of the object. This is Archimedes' Principle, and it also explains why some objects float and others sink.