A | B |

motion | A change in position with time |

speed | Rate of change of position (d/t) |

distance | The length between two points |

reference point | Stationary object used to determine if motion has occurred (change in position) |

displacement | A vector quantity - measure of the change in position: final position - initial position |

vector | A measure that has magnitude and direction; represented by an arrow |

average speed | total distance divided by total time |

constant speed | where speed does not change; "cruise control" |

instantaneous speed | speed at a particular point in time (look at the speedometer) |

velocity | speed in a given direction |

position | place/point determined relative to reference directions |

slope | the change in "Y" divided by the change in "X" = rise/run |

meter | metric unit of length measurement |

kilometer | 1000 meters |

centimeter | 1/100th of a meter; .01m |

millimeter | 1/1000th of a meter; .001m |

acceleration | a change in velocity and/or direction |

independent variable | variable on the "X" axis: "cause" |

dependent variable | variable on the "Y" axis: "effect" |

horizontal line | on a distance (position)/time graph this would indicate no motion |