This fun experiment explores density by discussing molecules, and determining whether objects sink or float.
Before you build your density dunk tank, take a few minutes to review matter and molecules (this is in the video too!). Using tape, make two equal sizes boxes on the floor. Choose an object you have quite a few of in the same shape and size (bouncy balls, dolls, etc.). These will represent molecules. Demonstrate that when you compare two objects of the same shape and size (the taped boxes), the one that has more molecules also has a higher density!
Want to duplicate the density dunk tank at home or in your classroom? Watch the video for an overview, gather the materials listed at the right, and follow the instructions below!