After making predictions, students are to drop the objects into the aquarium to observe whether or not the objects will sink or float. Remove objects from the aquarium and drop the objects into the baby bottles with the unknown solutions. Knowing the densities of the given objects, students are to predict the density of the unknown solutions. Students will make predictions based upon where within the jar the objects floated. After making predictions, give students the names and densities of the unknown solutions.
Students can compare their predictions.
A graph should be constructed in regards to Mass versus Volume. They should cut the top and construct a spout by cutting the side of the bottle 2cm wide and 6cm to 7cm long. Students will discover, when objects are put into the water, the water will rise or be displaced. Archimedes found that the amount of water displaced is equal to the mass of the object. In addition, Archimedes' Principle can be demonstrated by having students construct a small barge with aluminum foil with measurements about 10 square centimeters.