click below

click below

Normal Size Small Size show me how

# Nature of Science

### Vocab from the NOS unit

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

observation | Using one or more of your senses to gather information |

constant | Conditions in an experiment that are kept the same |

precision | Close, repeated measurements |

inference | An educated guess based on previous knowledge or cues |

prediction | An educated guess about what will happen in the future |

control group | Variables are compared to this "normal" group that isn't changed. |

meter | Metric unit of measurement for distance |

liter | Metric unit of measurement for volume |

International System of Units | Metric system, based on powers of 10 |

accuracy | How close a measurement is to the correct value |

hypothesis | Explanation of an observation that can be tested |

independent variable | This is what the scientist changes in an experiment |

gram | Metric unit of measurement for mass |

scientific law | Rule that describes a repeatable pattern in nature |

dependent variable | What is measured or observed in an experiment |

experiment | A test of the hypothesis |

scientific theory | An explanation (why or how) of observations that have occurred many, many times |

scientific notation | A method of writing large and small numbers in a shorter form |

quantitative | Observations that include numbers |

qualitative | Observations that are descriptions |

volume | Amount of space an object takes up, use grad. cyl. or LxWxH |

mass | Amount of matter in an object, use scale or TBB |

density | amount of mass per unit volume (m/v) |

density of water | 1 g/ml |

water displacement | Method used to find volume of a solid |

3 metric base units | meter, liter, gram |

1 cm = ? mm | 10 mm |

Name the metric prefixes in order from biggest to smalles | Kilo, Hecto, Deka, (base unit), deci, centi, milli |

1 meter = ? cm | 100 cm |

triple beam balance | tool for measuring mass (units are grams) |

graduated cylinder | tool for measuring volume of a liquid (units are ml) |

measuring irregular solid volume | water displacement (like a rock or ball) |

measuring regular solid volume | Measure with a cm ruler and multiply: LxWxH |

density | measures how tightly packed particles are in an object |

density of objects that float in water | less than 1 g/cm^3 |

density of objects that sink in water | greater than 1 g/cm^3 |

To calculate the density of an object | D = mass divided by volume |