Cartesian Diver - Erlenmeyer version

The Cartesian diver experiment demonstrates principles of buoyancy and pressure. By using a small vial or test tube, partially filled with water and sealed, which is placed in a larger container filled with water, the diver can be made to sink or float by squeezing the container. Squeezing increases the pressure, compressing the air inside the diver and decreasing its buoyancy, causing it to sink. Releasing the pressure allows the air to expand, increasing buoyancy and making the diver rise. This version, using an Erlenmeyer flask, showcases how changes in pressure affect buoyancy.