Present both a triple beam and a dial balance. Define and indicate the beams, riders, adjustment knob and pan. Discuss and demonstrate how to arrive at an accurate measurement of mass for a selected group of items.
Discuss the accuracy difference between the two balances, and how to accurately read each one. Determine the loss of mass from a burning candle after about 15 minutes of burning. Determine why mass was lost, and what happened to the missing mass.