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Measuring Mass & Volume of Matter

Measuring Mass & Volume of Matter. Matter is anything that has mass and volume. Mass is the amount of matter in an object. The base unit ‘gram’ is used when measuring mass. For example: kilogram, gram, and milligram…. The mass of matter is measured by using a balance.

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Measuring Mass & Volume of Matter

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  1. Measuring Mass & Volume of Matter

  2. Matter is anything that has mass and volume. • Mass is the amount of matter in an object. • The base unit ‘gram’ is used when measuring mass. • For example: kilogram, gram, and milligram…

  3. The mass of matter is measured by using a balance. • Instructions on use: • The triple beam balance is used to measure masses very precisely; the reading error is 0.05 gram. • With the pan empty, move the three riders (sliders) on the three beams to their leftmost positions, so that the balance reads zero.

  4. If the indicator on the far right is not aligned with the fixed mark, then calibrate the balance by turning the set screw on the left under the pan. • Once the balance has been calibrated, place the object to be measured on the pan.

  5. Move the 100 gram slider along the beam to the right until the indicator drops below the fixed mark. • The notched position immediately to the left of this point indicates the number of hundreds of grams.

  6. Now move the 10 gram slider along the beam to the right until the indicator drops below the fixed mark. • The notched position immediately to the left of this point indicates the number of tens of grams.

  7. The beam in front is not notched; the slider can move anywhere along the beam. The boldface numbers on this beam are grams and the tick marks between the boldface numbers indicate tenths of grams.

  8. To find the mass of the object on the pan, simply add the numbers from the three beams. • As with a ruler, it is possible to read the front scale to the nearest half tick mark.

  9. Volume is the amount of space an object takes up. • To find the volume of a regularly-shaped object: • Measure the length, width and height. • Multiply the 3 numbers. • The unit is ‘cubed’; cm3, or mm3

  10. To find the volume of an irregularly-shaped object, the displacementmethod is used.

  11. Fill the graduated cylinder to the 50 ml mark. (This is the 1st reading) • Tilt or angle the cylinder and slowly drop the object. • The water level should rise. (This is the 2nd reading)

  12. Subtract the 1st reading from the 2nd reading: • 2nd reading - 1st reading • This is the volume of the object. • The base unit ‘liter’ is used; such as milliliter, liter, or deciliter.

  13. Don’t forget: • Because the liquid is curved, • to read the volume correctly you must look at the meniscus (the bottom of the curve).

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