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31 Cards in this Set
 Front
 Back
Absolute Error

The difference between an experimental value and the accepted value of a measured quantity.


Accepted Value

The most probable value for a measured quantity, which is usually published in reference books.


Accurate

Describes a measurement that is the same or very close to the accepted value.


Constant Proportion

The relationship that exists between two quantities when an increase in one causes no change in the other.


Dependent Variable

The quantity that changes in an experiment as a result of changes made by the experimenter.


Derived Unit

A combination of two or more fundamental units used to simplify notation.


Direct Squared Proportion

The relationship that exist between two quantities in which an increase in one causes a square increase in the other.


Directly Proportional

Applied to the relationship between two quantities in which an increase in one quantities in which an increase in the other or a decrease in one quantity causes a decrease in the other.


Experimental Value

Measurement made during laboratory work which may stand alone or be incorporated into one or more formulas to yield a value for a physical quantity.


Extrapolation

The Extenstion of a graphed line beyond the region in which data was taken.


Force

A push or pull on a mass;
A vector quantity. 

Fundamental Unit

One of a set of units in which all quantities measured by physicists can be expressed.


Independent Variable

The quantity that the experimenter changes in an experiment.


Indirect Squared Proportional

The relationship that exists between two quantities in which an increase in one causes a squared decrease in the other.


Inversely Proportional

Applies to the relationship between two quantities in which an increase in one quantity causes a decrease in the other or a decrease in one quantity causes an increase in the other.


Line of Best Fit

A straight or curved line on a graph which approximates the relationship among a set of data points.


Mass

The amount of matter contained in an object.


Mean

The average, x, of a set n measurements, where x, is the individual measurement and f(i) is the frequency of measurements.


Percent Error

A measure of the reliabity of an experimental result calculated be dividing the absolute error by the accepted value and multipling the quotient by 100.


Precise

Describes several measurements taken ok the same event that are nearly identical.


Range

The horizontal distance traveled by a projectile.


Scalar

A quantity that has magnitude only, with no direction specified.


Scientific Notation

A way of expressing quantities which consists of a number equal to or greater than one and less than ten followed by a multiplication sign and the base ten raised to some intergral power.


SI Prefix

A prefix combined with an SI base unit form a new unit that is larger or smaller than the base formed by a multiple or submultiple of 10.


SI System

Provides standardized units for scientific measurements.


Significant Figures

The digits in a measured quantity that are known with certainty plus the one digit whose value has been estimated.


Slope

The inclination of a graphed line, determined as the ratio (change of y/change of x) for any two points on the same time.


Standard Deviation

The square root of the variance of a set of data.


Unit

A standard quantity with which other similar quantities can be compared.


Variance

The sum of the squares of the differences if the measurements in a set of data from the mean of the set, divided by the number of measurements.


Vector

A quantity that has both magnitude and direction, often shown graphically as an arrow with definite length and direction.
