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WARM UP 1.List the steps of the scientific method. 2.Write one sentence about whether theories or laws are better, and why.

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Presentation on theme: "WARM UP 1.List the steps of the scientific method. 2.Write one sentence about whether theories or laws are better, and why."— Presentation transcript:

1 WARM UP 1.List the steps of the scientific method. 2.Write one sentence about whether theories or laws are better, and why.

2 Measurement Notes Chem II

3 International System (SI) Basic Units –Length: meter (m) –Mass: gram/kilogram (g/kg) –Time: second (s) –Volume (liquid): liter (L) –Energy: joule (J) –Amount: mole (mol)

4 International System (SI) Derived Units –Temp: Kelvin (K) K = C° + 273.16 –Area:m 2 –Volume: m 3 –Density: g/cm 3

5 Metric Prefixes Kilo- (1000x) (km) (nm) Nano- (.000000001) (dm) Deci- (.1) (cm) Centi- (.01) (mm) Milli- (.001) (µm) Micro- (.000001) Base Unit (1)

6 Precision vs. Accuracy

7 Significant Figures Display precision Always measure to 1 more decimal place than the instrument is marked for

8 Significant Figures

9 WRAP UP 1.Compare and contrast precision and accuracy. 2.Convert 2.6 mL to kL.

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