13 notes - CHM Ch. 1 Review: The Scientific Method: How...

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CHM Ch. 1 Review: The Scientific Method: How scientists approach problems. 1) Observe and Collect Data. 2) Hypothesize 3) Experiment Units of Measurement: (Units give meaning to a number.) SI (system international) units are universal Mass: Kilograms(kg) Length: Meters(m) Time: Seconds(sec) Temperature: Kelvin(K) Amount of a Substance: Moles(mol) Luminous Intensity: Candela Electrical Current: amperes(A) Table: SI Unit Conversion in Documents Uncertainty in Measurements: All numbers obtained by measurement have a degree of uncertainty associated with them. In the lab you are limited by your instruments and how certain they can be. (ex. measuring using a ruler, subject to the uncertainty of the specific ruler one is using. Ruler A and B). One can only guess to the next smallest graduation/digit/place beyond what the instrument being used is uncertain Significant Digits (figures): The number one is certain of plus one place. Rules for Counting Significant Digits.
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13 notes - CHM Ch. 1 Review: The Scientific Method: How...

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