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PS Chapter 3:Measure

Leach Physical Science Chapter 3: Measurement

QuestionAnswer
What is the global scientific metric system? SI
What is an assessment of the exactness of a measurement? Precision
What is the measure of the inertia of matter in an object or within the boundaries of physical system? Mass
What is a digit in a measurement used to communicate the precision of the measurement? Significant Digits
What is a system of measurement in which all units of a given dimension are related to each other by powers of 10? Metric System
What is the mass of a substance or object contained within a stated volumetric unit? Density
What is an assessment of the random errors associated with a series of measurements? Repeatability
What is an assessment of the measurement error? Accuracy
What is the measure of the earth's gravity acting on the matter in an object? Weight
What is the space enclosed or occupied by an object or within the boundaries of physical system? Volume
List three sources of measurement error. instrument may be defective, instrument may be read incorrectly, environmental conditions
Give three examples of dimension and a unit used to measure it. length with the meter, time with seconds, mass with the kilogram
Why do most scientists prefer quantitative data? it is less likely to be misinterpreted
Why do scientist use significant digits? to indicate the precision of the measurement
Why do scientist repeat a measurement if possible? to eliminate random errors in the measuring process
Created by: CoachLeach