Materials to be adapted:
density cubes (steel, wood, aluminum, copper, PVC)
100ml graduated cylinder
A displacement tank is a large plastic beaker with a spigot on the side. When an object is placed into the full tank, water will flow out the side to be collected in a beaker. The water is then measured in a graduated cylinder to determine the amount displaced by the object------volume displaced=volume of the object.
Rough measurements to be sure but the purpose of the lab was to introduce the concept of density.
Density cubes were to be used during the first portion of the lab. The cubes are of the same size but are made of different materials. Students then do not focus on size/shape of the objects, but rather on the behavior of the various materials. As much as I would have loved to use density cubes (see the Nasco catalog here), I couldn't justify the expense for a single lab. We then turned to regular-shaped objects found in the house-----a Jenga block, a magnet, a die, and a cube of brass Lab Assistant cut from a larger bar. The regular (either cubic or rectangular prism) shapes would enable Daisy to easily determine the corresponding volumes by length x width x height. I couldn't find a bar magnet, so I substituted the circular one and held a quick review of the volume of a cylinder.