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# Physics

### Ch. 1 Test

Law a rule of nature that can never change
Theory experimentally proven hypothesis that can change
Mass the amount of matter in an object
Weight the force due to gravity acting on an object
Volume the amount of space occupied by an object in 3d measure
Density mass per unit volume
Unit used to express what measure
Variable used to express measurement
Vector quantity with both magnitude and direction/angle θ-theta
Scalar quantity with magnitude no direction
Matter anything that has mass and takes up space
Inertia an object's resistance to change in motion
Accuracy ability to compare to an accepted value
Precision ability to reproduce a measure
Kinetic Theory of Measure all matter is made up of tiny constantly moving particles
Systems of Measure metric/English= easier to convert- the units must agree
Fundamental Measurement Types length, mass, time
(Metric-English) mks-fps meter, kilo, seconds/ feet, pounds, seconds
Base Unit value of one- tells us what the measurement type is
Prefix (before base unit) multiple of 10- tells us how much of a base unit we have
Derived Unit unit made up two or more numbers
Critical Thinking the process that uses certain skills to solve a problem
Graphical Analysis In science, if we suspect that any two science measures are related, we can determine the exact relationship by graphing, provided we hold a 3rd measure constant
Created by: Hellokitty139
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