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# Apologia Chemistry

### 2nd edition

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

Matter | Anything that has mass and takes up space |

What is the measurement system that scientists use? | Metric System |

Mass is measured by | grams |

Distance is measured by | meter |

volume is measured by | liter |

time is measured by | seconds |

1 millimeter is _____ meters | 0.001 |

1 centimeter is _____ meters | 0.01 |

1 kilometer is _____ meters | 1000 |

Chemistry is the study of ______ | Matter |

What does not have mass? | light |

the metric unit for weight is the ______ | Newton |

to convert between units, you use the ___________ | facter-label method |

derived units are | units that are derived from the basic units that makes the metric system |

1 cubic centimeter is the same as 1 ________ | millimeter |

when measuring a liquid, the curved surface is called the _________ | meniscus |

Accuracy | An indication of how close a measurement is to the true vale |

precision | An indication of the scale on the measuring device that was used |

A digit within a number is considered to be a significant figure if it is a ____-_____ | non-zero |

A digit within a number is considered to be a significant figure if it is a ____ that is ____________________ | zero between two significant figures |

A digit within a number is considered to be a significant figure if it is a _____ at the ___________________ and to the ____________________________ | zero, end of the number, right of the decimal point |

you always represent a number as a something times a power of ____ | 10 |

Adding and Subtracting with Significant Figures: | When adding and subtracting measurements, round your answer sot that it has the same precision as the least precise measurement in the equation. |

Multiplying and Dividing with Significant Figures: | when multiplying and deviding measurements, round the answer so that it has the same number of significant figures as the measurement with the fewest significant figures. |

The definitions of the prefixes in the metric system and the integers we use in fractions are... | not considered when determining the sighnificant figures in the answer |

Density | An object's mass divided by the volume that the object occupies |