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unit 1-section 1
vocab words
Question | Answer |
---|---|
Chemistry | the composition, structure, properties, and reactions of a substance |
Scientific method | a method of investigation involving observation and theory to test scientific hypotheses |
SI | a complete metric system of units of measurement for scientists |
Weight | a measure of the heaviness of an object |
Precision | the quality of being sharply defined by virtue of exact detail |
Accuracy | the closeness with which an observation or a measurement of a variable approximates its true value |
Density | the concentration of matter, measured by mass per unit volume |
Significant figures | the first 3 numbers after the decimal point |
MSDS | (Material Safety Data Sheet) a form with data regarding the properties of a particular substance |
Mass | the physical volume or bulk of a solid body |
Volume | the amount of space occupied by a three-dimensional object or region of space, expressed in cubic units |
Length | the longest dimension of an object, or of the measurement between the two ends |
Derived units | any of the units of measure derived from combinations of the seven base units and two supplementary units of the International System |