Slide Your Mass Over
Learning and Applying the Skill of Using the Triple Beam Balance
Section A – Skill Acquisition
General Introduction to Skill A balance is generally used for weighing out small amounts of chemicals to use in solutions and determining the mass of different objects in physics in grams. Learning how to use a balance is important for collecting data or information and for ensuring accurate mass measurements.
Curriculum Objectives • S2-0-5a Select and use appropriate methods and tools for collecting data or information. • S2-0-5b Estimate and measure accurately using Systeme International (SI) and other standard units. Include: SI conversions.
Special Safety, Care, and Handling Aspects • Make sure the riders are at zero before carrying the balance. • Carry the balance with both hands and keep it horizontal. • Do not place anything hot directly on the balance pan. • Never pour chemicals directly on the balance pan. • Place balance on a level, sturdy surface and away from heavy traffic.
Setting Up the Balance • Make sure the riders are at zero. • Check to make sure the pointer swings freely along the scale. • Use the adjustment screw to obtain an equal swing of the beams, if necessary.
The Procedure with an Analogy Look at the riders on your balance. These will be used for balancing the weight of an object on the balancing pan. One is 100 grams, one is 10 grams and one is 1 gram.
Think of it this way: if you worked at a bank with only $100 bills, $10 bills, loonies, and small change and you have to give somebody $653.50, they would probably appreciate it if you gave them the fewest amounts of bills possible. How would you do this? You would start by giving them six $100 bills, then five $10 bills, then three loonies and small change last.
When using a balance, you do not know in