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# Science Ch. 1 Vocab

### The vocabulary words for chapter 1 in the Physical Science book.

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

science | study natural world |

observing | use senses to get info |

inferring | explain observations |

predicting | make forecast of what will be in the future based on past events |

chemistry | study of matter and how it changes |

physics | study matter of energy, motion forecast, and how they interact |

scientific inquiry | different ways scientists study the world |

hypothesis | possible answer to scientific inquiry |

parameter | factor that can be measured in an experiment |

manipulated variable | purposely changed variable |

responding variable | respond to manipulated variable |

controlled experiment | an investigation that only has one manipulated variable |

data | facts, figures, and other evidence gathered through observations |

communicating | share info about experiments with others |

model | picture or image of object or process |

scientific theory | well tested explanation |

scientific law | rule of nature (ex. law of gravity) |

SI | international system of units |

weight | a measure of the force of gravity on you |

mass | a measure of the amount of matter an object contains |

volume | the amount of space an object takes up |

meniscus | the curved top surface of the water in the graduated cylinder |

density | mass per unit volume |

Celsius scale | water freezes at 0 degrees and water boils at 100 degrees |

Kelvin scale | the SI temperature scale |

absolute zero | 0 K on the Kelvin scale, nothing can get colder than this, -273 degrees on the Celsius scale |

estimate | an approximation of a number based on reasonable assumptions |

accuracy | how close a measurement is to the true or actual value |

reproducibility | how close a group of measurements are to each other |

significant figures | all of the digits that have been measured exactly |

precision | a measure of the exactness of a measurement |

graph | a picture of your data |

horizontal axis | the graph line that runs left to right |

vertical axis | the graph line that runs up and down |

origin | the point where the two axes cross |

coordinate | a pair of numbers used to determine the position of a point on a graph |

data point | the point showing the location of where two lines cross |

line of best fit | a smooth line that reflects the general pattern of a graph |

linear graph | a line graph in which the data points yield a straight line |

slope | the steepness of the graph line |

nonlinear graph | a line graph in which the data points do not fall along a straight line |

Created by:
yosf