Units of Measure Mini-Math Camp. Scientists across the world use the International System of Units (SI).

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Presentation transcript:

Units of Measure Mini-Math Camp

Scientists across the world use the International System of Units (SI).

The International System of Units Lengthmeter m Masskilogram kg Timesecond s Amount of substancemole mol Thermodynamic temperatureKelvin K Electric currentamperes amps Luminous intensitycandela cd QuantityNameSymbol

Instruments for Measuring Volume Graduated cylinder Syringe Volumetric flask BuretPipet

Beaker, A beaker does not measure as precisely as a graduated cylinder or pipet. It should be used for approximate measure of liquid volume only.

When reading the volume of liquid in a graduated cylinder or pipet, you always take the reading at the bottom of the meniscus. The meniscus is the curved surface of the liquid.

To find the volume of an irregularly shaped object, you should: 1.Partially fill a graduated cylinder with water. 2. Record the volume. 3.Place the object in the cylinder. 4.Record the volume. 5.Subtract the initial volume from the final volume to get the volume of the object. (initial level)

#1. What is the volume of liquid in this graduated cylinder? Answer: 74.0 mL

#2. What is the volume of liquid in this graduated cylinder? Answer: mL

#3. How many grams are measured on this triple beam balance? Answer: g

Released TAKS Question: Copyright © and trademark ™ All Rights Reserved.

The pipet is graduated and the most precise. A test tube is not used for measuring. A beaker is graduated but not very precise. The Florence flask is not graduated. Released TAKS Question: Copyright © and trademark ™ All Rights Reserved.

The Original Metric Reference H2OH2O = 1 liter Volume 1 kg H2OH2O = 1 kilogram Mass 1/10 m Earth = 1 meter Length 1/10,000,000

The Official Standard Meter

The Official Standard Kilogram

Explain why it’s important for scientists around the world to use the same system of measurement.