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Chemistry Chapter 4

Hypothesis a testable statement
Theory a broad generalization that explains a body of facts or phenomena
Derived Unit combinations of SI base units
Density the ratio of mass to volume, or mass divided by volume
Accuracy refers to the closeness of measurements to the correct or accepted value of the quantity measure
Direct Proportion two quantities are directly proportional to each other is dividing one by the other gives a constant value
Precision refers to the closeness of a set of measurements of the same quantity made in the same way
Scientific Method a logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses and formulating theories that are supported by data
Model a model in science is more than a physical object; it is often an explanation of how phenomena occur and how data or events are related
SI A single measurement system called Le Système International d'Unités
Quantity something that has magnitude, size or amount
Inverse Proportion two quantities are inversely proportional if their product is constant
Percent Error calculated by subtracting the experimental value from the accepted value, dividing the difference by the accepted value, and then multiplying by 100
System a specific portion of matter in a given region of space that has been selected for study during an experiment or observation
Conversion Factor a ratio derived 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
Significant Figures consist of all the digits known with certainty plus one final digit, which is somewhat uncertain or is estimated
Scientific Notation numbers written in the form M x 10^n, where the factor M is a number greater than or equal to 1 but less than 10 and n is a whole number .
Created by: 533450