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Measuring Mass by Georgeann Wright

Measuring Mass by Georgeann Wright. Mass is………. a physical property of matter It is the amount of matter in an object. We measure mass in grams. Mass. A friendly reminder from Frogger:. A frog has the same mass on the Earth and on the Moon. Weight is different….

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Measuring Mass by Georgeann Wright

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  1. Measuring Massby Georgeann Wright

  2. Mass is……….. • a physical property of matter • It is the amount of matter in an object. • We measure mass in grams.

  3. Mass • A friendly reminder from Frogger: • A frog has the same mass on the Earth and on the Moon.

  4. Weight is different…. • It’s the amount of the pull of gravity on an object. Boy, I could jump REALLY high on the moon. • A frog weighs less on the moon than on the Earth because there is less gravity on the moon.

  5. Mass • Is measured with a 3-beam balance and is measured in grams.

  6. Weight • Is measured with a SPRING SCALE. • It is measured in Newtons.

  7. To measure mass…. • We use a 3-beam balance. The unit is grams (g). http://www.wisc-online.com/Objects/ViewObject.aspx?ID=GCH202

  8. Let’s look at a 3-beam balance. Measurement tray: Holds the mass to be measured. Rider Beams: Hold the weights that can be slid and slipped into grooves. Riders: The actual weights ( 1gram, 10 grams, 100 grams) Adjustment Knob: moves the pointer up and down to balance it. Pointer: must point directly at the zero mark when balanced

  9. Practice on a 3-beam balance…at this website. • First move all weights to the far left at the “0”. • Next, use the largest weights first. • Make certain that the two arrows meet. • http://www.touchspin.com/chem/DisplayTBB.html

  10. You will measure the mass of the following items at your group: Full soda can Empty soda can Metric ruler Paper clip 2 objects of your choice

  11. Test yourself on your knowledge. • What is the function of the beams with riders? • What is the function of the adjustment knob? • What is the function of the pointer? • What is the function of the measurement tray? • 5. Explain the difference between weight and mass

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