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Chemistry Module 1

Measurement and Units

TermDefinition
Matter Anything that has mass and takes up space.
Unit Standard used for making comparison in measurements.
Metric System The decimal measuring system based on the meter, liter, and gram as units of length, capacity, and weight or mass.
English System The measuring system based on the foot, gallon, Newton and slug as units of length, capacity, weight, and mass.
Factor-Label Method a technique for converting units of measurement into other units of measurement by arranging fraction conversions so all but the desired unit cancel.
Derived Unit A unit of measurement obtained by multiplication or division of the base units of a system without the introduction of numerical factors.
Graduated Cylinder A tall narrow container with a volume scale used especially for measuring liquids.
Meniscus The downward curve seen at the top of a liquid in a container.
Accuracy An indication of how close a measurement is to the true value.
Precision An indication of the scale on the measurement device that was used.
Significant Figure The number of important single digits (0 to 9 inclusive) in the coefficient of expression in the scientific notation.
Scientific Notation The representation a number as a factor between 1 and 10 multiplied by a power of 10.
Density An object's mass divided by the volume that the object occupies.
Created by: vernahale
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