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18 Cards in this Set
 Front
 Back
Scientific Method

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)


System

a specific portion of matter in a given region of space that has been selected for study during an experiment or observation


hypothesis

testable statement


model

a physical object or explanation of how phenomena occur and how data or events are related


theory

broad generalization that explains a body of facts or phenomena


quantity

something that has magnitude, size, or amount


weight

a measure of the gravitational pull on matter


volume

the amount of space occupied by an object


density

the ration of mass to volume, or mass divided by volume


conversion factor

a ration derived from the equality between two different units that can be used to convert from one unit to the other


dimensional analysis

a mathematical technique that allows you to solve problems involving measurements


accuracy

the closeness of measurements to the correct or accepted value of the quanity measured


precision

refers to the closeness of a set of measurements of the same quantity made in the same way


percentage error

calculated by subracting the accepted value from the experimental value, dividing the difference by the accepted value, and then multiplying by 100


Significant Figures

consist of all the digits known with certainty plus one final digit, which is somewhat uncertain or is estimated


Scientific notation

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


Directional proportional

characteristic of two quanitities by which dividing one by the other gives a constant value


inversely proportional

charactersitic of two quantities by which their product is a constant
