2. Measurement Macroscopic – Measurement that can be determined directly (ruler, volumetric flask) Microscopic – On the atomic or molecular scale and are determined indirectly (IR spectrometer, X-Ray)

3. Systeme International base units (SI Units) LengthMeterm Massgramg VolumeLiterL TimeSeconds TemperatureKelvinK HeatJouleJ CurrentAmpereA

4. WrittenSymbolExponentialDecimal megaM10 6 1 000 000 kilok10 3 1 000 hectoh10 2 100 dekada10 1 10 10 0 1 decid10 -1 0.1 centic10 -2 0.01 millim10 -3 0.001 microµ10 -6 0.000 001

5. Density - The amount of mass per unit volume Density = Mass D = M Volume V

6. Heat - measure of the quantity or how much energy Temperature - measure of the intensity or how energetic each particle is

8. Precision and Accuracy Accuracy – How close the measurement is to the true value Precision – how close two or more measurements of the same quantity agree with one another