View
225
Download
9
Category
Tags:
Preview:
Citation preview
PRECISION VS ACCURACYPRECISION IS _____________________a set of measurements are to each other
ACCURACY IS _____________________a measurement is to the
_________________________________ of what is being measured
SIGNIFICANT FIGURES are….All of the digits (numbers) in a
_______________________ that can be
known ___________________ plus one
______________________ digit.
PART 2 CONCEPTS OF SIGNIFICANT FIGURES
The number of significant figures that a measurement has is determined by
________________________________
________________________________
The MORE LESS precisea measurement is, the
MORE LESS significant figures it has.
They are DIRECTLY INVERSELYrelated.
Factors to consider when buying a measuring tool:
How much ___________________ do you need?
How much can you _________________________?
Which is ____________________________ to use?
Equipment with greater precision requires
more _______________________________ to use
and more _________________________________
If you use a costly measuring device, that gets many significant
figures, your measurement is more
PRECISE.Is it also more
ACCURATE?
EXACT NUMBERS are…
numbers by _________________ &
numbers by ___________________
They have ____________________significant figures
Some examples ofNUMBERS BY DEFINITION
1 foot = EXACTLY 12 inches
1 kg = EXACTLY 1000 g
1 a.m.u. = EXACTLY 1/12th the mass of 1 atom of carbon-12
Zeroes to the right of a number(where there is a decimal point)
ARE AREN’Tsignificant, because they indicate that
Recommended