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19 Cards in this Set
- Front
- Back
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accuracy
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the closeness of measurements to the correct or accepted value of the quantity measured
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conversion factor
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a ratio derived from the equality between two different units that can be used to convert from one unit to the other
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density
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the ratio of mass to volume or mass divided by volume
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derived unit
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a unit that is a combination of SI base units
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direct proportion
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two quantities that give a constant value when one is divided by the other
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hypothesis
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a testable statement
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inverse proportion
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two quantities that have a constant mathematical product
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model
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an explanation of how phenomena occur and how data or events are related
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percent error
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a value calculated by subtracting the experimental value from the accepted value, dividing the difference by the accepted value, and then multiplying by 100
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precision
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the closeness of a set of measurements of the same quantity made in the same way
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quantity
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something that has magnitude, size, or amount
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scientific method
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a logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypothesis, and formulating theories that are supported by data
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scientific notation
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numbers written in the form M ×10^n where the factor M is greater than or equal to 1 but less than 10 and n is a whole number
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SI (Le Système International d’Unité)
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the measurement system accepted worldwide
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significant figure
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any digit in a measurement that is known with certainty plus one final digit, which is somewhat uncertain or is estimated
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system
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a specific portion of matter in a given region of space that has been selected for study during an experiment or observation
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theory
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a broad generalization that explains a body of facts or phenomena
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volume
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the amount of space occupied by an object
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weight
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a measure of the gravitational pull on matter
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