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# RSM Chp. One

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

science | is the study of the natural world. |

observing | means using one or more senses to gather information. |

inferring | explain your observation based on resoning from what you already know. |

predicting | means making a forecast of what will happen in the future based on past experience or evidence |

chemistry | is the study of the properties of matter and how matter changes |

physics | is the study of matter, energy, motion, and forces, and how they interact. |

scientific inquiry | refers to the different ways scientists study the natural world. |

hypothesis | is a possible answer to a scientific question or explanation for a set of observations. |

parameter | is a factor that can be measured in an experiment |

manipulated variable | one variable parameter is purposely changed |

responding variable | the variable that is expected to change because of the manipulated . |

controlled experiment | an investigation in which only one parater is manipulated at a time. |

data | are the facts, figures, and other evidence gathered through observation |

communicating | is sharing ideas and conclusions with other through writing and speaking. |

model | is a picture, diagram, computer image, or representation of an object or process |

scientific theory | is a well-tested explanation for a wide range of observation or experimental results |

scientific law | is a statement that describes what scientists expect to happen every time under a particular set of conditions |

SI | An expanded metric system called International System of Units to measure length, volume, mass, density, temperature, and time. |

weight | is a mesure of the force of gravity on you |

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

volume | is the amount of space an object takes up....measured by length times width times height or by water displacement |

meniscus | the top surface of the water in the graduated cyclinder |

density | is mass per unit volume |

Celsius scale | There are exactly 100 degrees between the freezing point and boiling of fwater. |

Kelvin scale | is the SI unite of temperature and same size as those on the Celsius scale |

absolute zero | is the temperature at 0 degrees Kelvin on the Kelvin scale |

estimate | is an approximation of a number based on resonalbe assumptions. |

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

significant figures | in a measurement include all of the digits that have been measured exactly, plus one digit whose value has been estimated. |

precision | is a measure of the exactness of a measurement |

graph | reveal patterns or trends that words and data tables cannot by bar graphs, circle graphs, and line graphs |

horizontal axis | or x-axis is the graph line that runs left to right |

vertical axis | or y-axis is the graph line that runs up and down. |

origin | the point where the two axes cross. |

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

data point | the point showing the location of that intersection |

line of best fit | is 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 | on a linear graph is the steepness of the graph line. Rise over run tells you how much y changes for every change in x. |

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

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