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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 |