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  1. Today’s Agenda… • Bellringer: What is volume? How is it different than area? • Notes on Measuring Mass and Density • Activity: Crazy Canisters

  2. Measuring Mass Study Pack #5

  3. Measuring Mass • Mass is the amount of matter in an object and it stays the same no matter where you are • You can measure mass using a triple-beam balance • Mass is measured in grams (g)

  4. Triple-Beam Balance • A triple beam balance includes the following parts: • Adjustment knob • Pan • Riders • Beams • 0-500 grams • 0-100 grams • 0 – 10 grams • Pointer

  5. Triple-Beam Balance • Before using a triple-beam balance to measure an object you must calibrate it • 1. Slide all of the riders back to zero • 2. Check to see that the pointer points to zero • 3. If not, twist the adjustment knob until it does • 4. You must make sure your scale is calibrated each time you measure an object

  6. Measuring Mass on a Triple-Beam Balance • Measuring mass directly • Measuring mass by difference

  7. Measuring Mass Directly • 1. Place the object on the pan • 2. Move the riders on the beams until you get the lines on the right side of the scale to match up again

  8. Measuring Mass Directly • Once you have balanced the scale, add up the amounts on each beam to find the total mass

  9. Measuring Mass by Difference • Used to find the mass of a liquid • 1. Find the mass of an empty beaker and record this mass. • 2. Pour the liquid into the beaker and find the mass of the beaker and the liquid. Record this mass. • 3. Subtract the mass in #2 from the mass in #1 to give you the mass of the liquid