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Chemistry

Unit 1 Concept 1 Mesurement

QuestionAnswer
Explain the difference between accuracy and precision, ad the significance of having data that is both. Accuracy is when your data is very similar or the same as the accepted value. Precision is when your data is constant. Your data should be accurate and precise so that you can get the most correct answer.
List the standard units for length, mass, time, temperature, and amount of substance Length: meter, Mass: kilogram, Time: seconds, Temperature: Kelvin, Amount of substance: Mole
Give an example of a scientific investigation design, with appropriate constants ans variables (IV and DV) the seed lab in biology where we measured the amount of water being used to water the plants (IV) then we measured the amount of growth/germenation happening (DV).
Convert 275F to Kelvin 408
Convert 1800mm to cm, and 4.9ks to s 180cm, 4900s
Determine the number of sig figs: 3.01, 850, 7102.0, 0.00990 3.01: 3, 850: 2, 7102.0: 5, 0.00990: 3
Observation Any info that is gathered with the senses.
Inference The process of drawing conclusions based on evidence and reasoning.
Qualitative data data that describes qualities of a material, usually without values.
Quantitative data data that describes qualities of a material which are measurable and expressed with values.
Conversion factors a ratio of equivalent values used to express the sme quantity in different units.
Significant figures The digits of value which carry meaning towards the resolution of the measurement.
Created by: Kamryn7
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