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Physics
Ch. 1 Test
Question | Answer |
---|---|
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 |