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chapter 4
terms and definitions
Term | Definition |
---|---|
Hypothesis | testable statement |
Theory | a broad generalization that explains a body of facts or phenomena |
Derived unit | combinations of Si base units form these |
Density | the ratio of mass to volume, or mass divided by volume |
Accuracy | the closeness of measurements to the correct or accepted value of the quantity measured |
Direct Proportion | when two quantity are equal to the others accepted value |
Precision | refers to the closeness of a set of measurements of the same quantity made in the same way |
Model | explains how a phenomena occurs and how data or events are realated |
SI | the single measurement system that all scientists agreed on is called Le Systeme International d'Unites abbreviated SI |
quantity | something that has magnitude, size, or amount |
system | a specific portion of matter given region of space that has been selected for study during the experiment or observation |
conversion factor | the ratio derived from the equality between two different units that can be used to convert from one unit to the other |
weight | a measure of the gravitational pull on matter |
volume | the amount of space occupied by an object |