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19 Terms

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Measurement

A quantitative observation

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Scientific Notation

Expresses a number in the form N x 10^m; a convenient method for representing a very large or very small number and for easily indicating the number of significant figures

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Unit

The part of the measurement telling us to scale being used

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Metric System

A decimal-based measuring system

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International System (IS)

A standardized unit system based on the metric system that is used globally; the most commonly used system of scientific measurement

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Meter

The basic SI unit of length

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Volume

The amount of 3 dimensional space occupied by a substance

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Liter

The fundamental unit of volume in the SI system, equal to 1 cubic decimeter

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Mass

The quantity of matter in an object

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Kilogram

The base SI unit of mass

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Significant Figures

The certain digits and the first uncertain digit of measurement

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Conversion Factor

A ratio used to convert from one unit to another

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Equivalence Statement

The relationship between measurements in different units that measure the exact same quantity

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Dimensional Analysis

the process of using conversion factors to change from one unit to another

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Fahrenheit Scale

A temperature scale on which water freezes at 32 degrees and boils at 212 degrees

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Celsius Scale

A temperature scale based on powers of 10 on which water freezes at 0 degrees and boils at 100 degrees, most commonly used for scientific measurement

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Kelvin (absolute) scale

A temperature scale on which 0K is abolute zero, water freezes at 273K, and water boils at 373K; the Kelvin is the SI unit of temperature

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Density

The mass of a substance per a given volume of that substance

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Specific Gravity

the ratio of density of a given liquid to the density of water at 4 degrees celsius

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