Materials List: Rock and Boat:
Density, Buoyancy & Archimedes’ Principle

To perform this activity as a class, the following materials are needed:

  • clear bucket filled with water
  • toy boat (alternatives: reusable storage containers of various shapes and sizes, or make a boat using available classroom or household materials)
  • large rock (or an equivalent object of varying size and weight; a good option is a metal weight used in kinetics or other physics activities)
  • sticky notes and a pen, to mark water levels
  • 3 or more large poster-sized sheets of paper
  • pens or markers, for writing on the poster-sized papers
  • Rock and Boat Worksheet, one per student