Materials List: Waterwheel Work:
Energy Transformations and Rotational Rates

Each group needs:

  • 1 empty, clean two-liter plastic soda bottle (ask students to bring from home or collect from recycling center)
  • 1 pair of scissors
  • tape
  • 6-8 large index cards (4 x 6-inch size works)
  • waterproofing materials to wrap over the index cards (aluminum foil, plastic wrap, etc.) so that the index cards do not disintegrate in the water
  • pen or marker
  • wooden dowel, ~¾-inch (2 cm) diameter (to fit into the bottle opening with a little room to turn) and longer than the length of the soda bottle; dowel can be re-used (Alternative: If large-enough dowels are not available, use smaller dowels and drill holes into the bottle cap big enough to accept the dowel and allow it to spin.)
  • timer, clock or watch (to count seconds elapsed)
  • string

For the entire class to share:

  • water source
  • pouring container to hold ~ 2 liters water
  • sink or outside area that can get wet