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17 Cards in this Set
- Front
- Back
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scientific method
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a logical approach to solving problems by ovserving and collecting data, formulating hypotheses, testing hypotheses, and formulating theories that are supported by data
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observing
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use of the senses to obtain info; making measurements /collecting data; descriptive(qualitative) numerical (quantitative)
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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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generalizations
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statements that apply to a range of info
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hypothesis
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a testable statement
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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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theory
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a broad generalization that explains a body of facts or phenomena
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derived units
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any combo of two or more base unites
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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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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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percent error
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a valure calculated by subtraciting the experimental value from the accepted value, dividing the difference by the accepted value, and then multiplying by one hundred
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significant figures
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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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mass
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kilograms
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length
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meters
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time
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seconds
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temperature
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kelvin
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amount
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moles
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