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18 Cards in this Set
- Front
- Back
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Scientific Method
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a logical approach to solving problems that lend themselves to investigation (observing/collecting data, formulating hypotheses, testing hypotheses, and formulating theories that are supported by data)
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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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hypothesis
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testable statement
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model
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a physical object or explanation of how phenomena occur and how data or events are related
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theory
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broad generalization that explains a body of facts or phenomena
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quantity
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something that has magnitude, size, or amount
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weight
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a measure of the gravitational pull on matter
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volume
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the amount of space occupied by an object
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density
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the ration of mass to volume, or mass divided by volume
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conversion factor
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a ration derived from the equality between two different units that can be used to convert from one unit to the other
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dimensional analysis
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a mathematical technique that allows you to solve problems involving measurements
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accuracy
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the closeness of measurements to the correct or accepted value of the quanity measured
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precision
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refers to the closeness of a set of measurements of the same quantity made in the same way
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percentage error
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calculated by subracting the accepted value from the experimental value, dividing the difference by the accepted value, and then multiplying by 100
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Significant Figures
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consist of all the digits known with certainty plus one final digit, which is somewhat uncertain or is estimated
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Scientific notation
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numbers are written in the from Mx 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
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Directional proportional
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characteristic of two quanitities by which dividing one by the other gives a constant value
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inversely proportional
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charactersitic of two quantities by which their product is a constant
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