# Shared Flashcard Set

## Details

Measurments and Calculations
N/A
19
Chemistry
09/24/2011

Term
 Hypothesis
Definition
 a testable statement
Term
 Scientific method
Definition
 a logical apporach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses, and fromulating theories that are supported by data
Term
 System
Definition
 a specific portion of matter in a given region of space that has been selected for study during an experiment or observation
Term
 Theory
Definition
 a broad generalization that explains a body of facts or phenomena
Term
 Model
Definition
 an explanation of how phenomena occur and how data or events are related
Term
 Conversion factor
Definition
 a ratio derivied from equality between two different units that can be used to convert from one unit to the other
Term
 Density
Definition
 the ratio of mass to volume or mass  divided by volme
Term
 SI ( Le Systeme Iternational d' unites)
Definition
 the measurement system accepted worldwide
Term
 Volume
Definition
 the amount of space occupied by an object
Term
 Weight
Definition
 a measure of the gravitational pull on matter
Term
 Quanity
Definition
 something that has magnitude, size, or amount
Term
 Derivied unit
Definition
 a unit that is a combination of SI base units
Term
 Accuracy
Definition
 the closeness of measurements to the correct or accepted value of the quanity measured
Term
 Direct porportion
Definition
 two quantities that give a constant value when ine is divided by the other
Term
 inverse proportion
Definition
 two quantities thathave a constant mathematical product
Term
 Percent error
Definition
 a value calculated by subtracting the experimental value from the accepted value, dividing the difference by the accepted value and then multiplying by 100
Term
 Precision
Definition
 the closeness of a set of measurmets of the same quanity made in the same way
Term
 Significant figure
Definition
 any digit in a measurement thst is known with certanity plus one final digit, which is somewhat uncertain or is estimated
Term
 Scientific method
Definition
 a logcal appoach to sloving problems by observing and colleting data, formulating hypotheses, testing, hypotheses, and formulating theories that are supported by data
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