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28 Cards in this Set
- Front
- Back
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Units of Measurement
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kilo hepta deca deci centi and milli (King Henry died by drinking chocolate milk)
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Meter
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length
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Kilogram
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mass
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Liter
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Volume.
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Second
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time
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Kelvin
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Temperature
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1cm3
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1 ml
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1dm3
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1 L
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The name of the curve in glass
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meniscus
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How do your measure a meniscus
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at the lowest point
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Temperature
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the measure of how hot or cold the object is relavtice to other objects
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Absolute zero
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where all molecular motion ceases (zero kelvin)
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Volume
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the space occupied by an object (cm3)
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Density
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the ratio of mass to volume. It can be used to identify a sample of mass.
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D=
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mass/volume=g/cm3= g/ml
1.1 sink .9 float |
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Scientific notation
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easy way to handle extremely large or small number. Numbers expressed in scientific notation are a product of two factors. A number betweeen 10 and 1 and ten raised to a power.
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Circle Graphs
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show parts of a whole
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Mole
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6.022 x 10^23
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Bar Graphs
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show how a factor varies with time, location, or temperature.
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Slope
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steepness of a line
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slope equation
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y2-y1/x2-x1
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When te mass of a material is plotted against volume...
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the slope of the line is the density of the material
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significant figures
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reflects the precision of reported data. Answers to calculations are rounded off to maintain the correct number of significant figures.
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Rules for Significant Figures
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non-zero numbers are always significant. zeros between non-zero numbers are always significant numbers. all final zeros to he right of the decimal place are significant. zero that act as placeholders are not significant.
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accurate measurement
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close to the accepted value. it shows little variation over a series of trials there will be little variation.
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Percent error
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the ratio of an error to an accepted value. error/accepted value x100%
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convert kevlin to celsius
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minus 272
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convert celsius to kelvin
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plus 273
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