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# Final Review

### Bio 10

Term | Definition |
---|---|

Chemistry | study of composition, structure, properties, and reactions of matter |

Matter | all substances that make up our world--anything that has mass and occupies space and is either pure substances or mixtures |

Chemicals | substances that have the same composition and properties wherever found |

Scientific Method | set of general principles that help to describe how scientists think |

Steps of the Scientific Method | Make Observations Propose a Hypothesis Conduct Experiments Form a Conclusion |

What are the two parts of the scientific notation? | coefficient and power of 10 |

Units of Measurement in Metric | length: m volume: L mass: g Temp: Celsius Time: s |

Units of Measurement in SI | length: m volume: m^3 mass: kg Temp: K time: s |

1m | 100 cm |

1L | 1000mL |

1kg | 1000g |

Measured Numbers | numbers obtained when you measure a quantity such as your height, weight, or temperature -observe the numerical values of marked lines -estimate value of the numbers between marks -use the estimated number as the final number in your measured numbered |

Significant Figures | -used to represent the amount of error associated w a measurement -all nonzero digits and zeros between digits -zeros at the end of a decimal number |

Exact Numbers | are in definitions that compare two units in the same measuring system |

Multiplication and Division---Sig Figs | final answer is written so that it has the same number of sig figs as the measurement w the fewest sig figs |

Adding and Subtracting--Sig Figs | final answer is written so that it has the same number of DECIMAL places as the measurement w the fewest decimal places |

Equalities | use two different units to describe the same measured amount |

Density | compares the mass of an object to its volume DENSITY=MASS OF A SUBSTANCE/VOLUME OF A SUBSTANCE |

pure substances | have a fixed or definite composition an element that is composed of one type of atom a compound that is composed of two or more elements always combined in the same proportion |

mixtures | contain two or more different substance that are physically mixed but not chemically combined |

elements | pure substances that contain only one type of material |

compound | contains two or more elements in a definite ratio |