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# science final review

### fall semester

Question | Answer |
---|---|

define mass what is the unit for mass | amount of matter in an object grams |

define volume what is the unit for volume | amount of mass in a given space ML |

define density what is the unit for density | an objects ability to sink or float g/ml or g/cm3 |

how do you find the volume of an irregular shaped idem? | displacement |

what is the formula to find volume | mass divided by density |

what is the formula to find density | mass divided by volume |

what is the formula to find mass | density times volume |

what is a safe way to sell something in a lab | wafting |

when should you wear safety goggles | when working with heat,chemicals,fire,and glass |

define independent variable | |

define controlled variable | |

define dependent variable | |

elements in the same group have what in common | # of valance electrons (react chemically simular) |

elements in the same period have what in common | # of electron shells |

what is the charge of a proton | positive |

what is the charge of a neutron | negative |

what is the charge of an electron | non or neutral |

mass is ------ | middle |

what is the large number in front of am element called | coefficient |

what is the small number after an element called | subscript |

define compound element | |

define element | |

define chemical change | |

lidt the 6 evidences that a chemical change has occurred | 1.unexpected color change 2.gas produced 3.odor produced 4.solid precipitate formed 5.light produced 6.tempature change |

what die the law of conservation of mass state | nothing is ever created or destroyed only changed |

define observation | statement using your 5 senses |

define inference | conclusion based on your observation |

define hypothisis | statement about what you think will happen |

what is the main rule when creating a hypothesis | making sure it is an if then statement |

what is the formula for speed | distance divided by time |

what is the formula for distance | speed times time |

what is the formula for time | distance divided by speed |

what is the formula for force | acceleration times mass |

what is the formula for acceleration | force divided by mass |

what i the formula for mass | force divided by acceleration |

when conculating acceleration what unit do you use | m/s2 |

define balanced force | |

define unbalanced force | |

What is newtons first law | |

what is newtons 2nd law | |

what is newtons 3rd law |

Created by:
Emme07