CHAPTER 2 Flashcards
Measurements
assigning number to a distinct object or event in comparison with other objects, basis for qualitative research
Measurement
study of measurements
Metrology
most famous form of measurement in the 3rd Millenium B.C
Cubit
length equivalent to 500 feet(1480m) in England
Roman Mile
She changed the statues by 1 mile = 5280 ft or furlongs that is also equivalent to 40 rod units
Queen Elizabeth I
earliest known and smallest unit of mass
grain in apothecary
a system of weights based on a pound of 16 ounces or 7000 grains, used to measure early medical recipes
Avoirdupois
to weigh precious metal like gold, what early unit was used?
grain of wheat or barely corn
a unit of measurement intended only for precious metals and gems
Troy
highly sensitive lab instrument covered with glass designed to accurately measure mass
Analytical Balance
used during 2nd millennium BC, it made use of the motion of the sun for time: the length and the position of the shadow cast by a stick held vertically
Sundial
He first attempted to record time using sundial
Erastosthenes
measured values are close to the actual or accepted values
Accuracy
measured values are close to each other
Precision
Sources of Error in Measurement
a. respondent
b. situation
c. measurer
d. instrument
