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19 Cards in this Set

  • Front
  • Back
hypothesis
a testable statment
model
an explanation of how phenomena occurs and how data or events are reslated
sceientirfic method
a logical approach to solving problems by observing and collecting data, forumalating hypothesis, testing it , 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
theory
a braod generalization that explainsa body of facts or phenomena
conversion factor
a ration derived from the equality between 2 different untis that can be used to convert form one unit to another
density
the ration of mass to volume or mass divided by ovolume
derived unit
a unit that is a comhination of SI base untis
quanitity
something that has magnitude, size or amount
SI
the measurement system measured worldwide
volume
the amount of space occupied by an object
weight
a measure of the gravitaional pull on matter
accuracy
the closeness of measuremetns to the correct value when one is divided by the other
indirectly proportional
two quanitites have the same mathematical product
directly proportional
two quanitites that give a constant value when one is divided by the other
percent error
a value calculated by subtracting the experimental value from the accepted value, divideing the difference bt the accepted value and then multiplying by 100
precision
the closeness of a set of measurements of the same quantity made in the same way
scientific notation
numbers written in the form MX10^n where the factor M is a number greater than or equal to one but less than ten and n is a whole number
significant figures
any digit in a measurement that is known with certainty plus one final digit, which is somewhat uncertain or is estimated