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MEASUREMENTS:

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**SI = International System of Units (standard system of measurement)**

You must always label measurements with the appropriate unit. Example: 5, 5 what? 5cm

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SI UNITS: Length = meters (m) Volume = liters (L) Mass = kilograms (kg) Time = seconds (s)

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**When you are taking measurements with a…..**

Ruler…you will need to know the difference between cm and mm. This is measuring LENGTH.

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**You want to read from the bottom of the meniscus.**

Graduated Cylinder… You want to read from the bottom of the meniscus. The meniscus = the curved line of liquid on a graduated cylinder Read to the nearest .1 (tenth) Example: 25.3mL (the units from a graduated cylinder is milliliters) This is measuring VOLUME

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**You will read to the nearest .1 (tenth). **

Balance: You will read to the nearest .1 (tenth). You will add up all three arms of measurement to get total mass. Example 132.4g (grams) This is measuring MASS.

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What does this read? Always start with the biggest and then work down to the smallest. 373.3g

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Lesson 1: Length T. Trimpe 2008

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