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Measurement

Measurement. Mass, Volume, Length Grams, Liters, Meters, cm 3. Length. Measuring Length. Recall the metric system is a decimal-based system Begin measuring at 0 Measure to the nearest mm (millimeter) We would write 7cm and 6mm as 7.6cm How could we write 7.6cm as mm? 76mm.

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Measurement

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  1. Measurement Mass, Volume, Length Grams, Liters, Meters, cm3

  2. Length

  3. Measuring Length • Recall the metric system is a decimal-based system • Begin measuring at 0 • Measure to the nearest mm (millimeter) • We would write 7cm and 6mm as 7.6cm How could we write 7.6cm as mm? 76mm

  4. Let’s Practice

  5. Volume

  6. Measuring Volume (liquid) We measure using mL We use beakers for a less accurate measurement We use graduated cylinders for precise measurement We measure to the bottom of the MENISCUS Video

  7. Meniscus

  8. Measuring Volume • When measuring regular-shaped objects, we find volume be multiplying length X width X height • V=L x W x H • When measuring a regular-shaped SOLID, we use cm3 • cm3 is equal to 1 mL of volume • Let’s practice

  9. Measuring Volume Continued… Archimedes’ Principle- how do I know I used enough gold??? When measuring an irregular-shaped object, we use a method called DISPLACEMENT volume2-volume1= object’s volume Video Let’s Practice

  10. From .6mL to 1.7mLWhat is the volume?

  11. Let’s Recap What is the formula for measuring volume of a solid when using a meter stick? Length x Width Arms x Legs Length x Width x Height

  12. Let’s Recap Continued When measuring the volume of a liquid, which tool is more accurate? Meter Stick Beaker Graduated Cylinder

  13. Let’s Recap Continued What is this “dip” in the liquid called? Low line Waterline Meniscus

  14. Measuring Mass with a Triple Beam Balance in (g)

  15. Balance Parts Pan Beams Weights 1g in front 100g in middle 10g in back Zeroing Knob All weights are to the left first! Line up the balance line

  16. Using the Balance After you have “Zeroed Out” the balance… Start with the smallest weight first Move the weight right and see if the balance lines up Adjust as needed until your balance lines up Read the balance to the nearest decigram (dg) Video

  17. One More Thing… When measuring the mass of a liquid we measure the mass of the container first Then we measure the mass of the container WITH the liquid Then we subtract Mass2 – Mass1 = Mass of the Liquid Let’s Practice

  18. Measurement Stations

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