MEASUREMENTS Flashcards
a process of
determining the extent of the dimensions,
quantity, or extent of something.
measurements
The most convenient
system of units is the ..
International System of
Units (SI).
indicate
the size of the unit relative to the base unit
prefixes
is the consistency of a result.
Precision
is determined when a certain quantitative value is
relatively close to the “true value”
Accuracy
is the uncertainty
that arises from a scale reading which results from the
uncontrolled variables in the measurement.
RANDOM ERROR (indeterminate error)
is the uncertainty that may come
from a flaw in the equipment used or design of an experiment. These error
are usually caused by measuring instruments that are incorrect calibrated or
are used incorrect.
SYSTEMATIC ERROR (determinate error)
provides
a
convenient
way
of
recording
results
and
doing calculations.
Scientific Notation
the digits in any measurement
that are known certainty with an additional one digit
which is uncertain.
Significant figures
is a process in which a conversion factor
written in a form of ratio is used to change units given in the data to the
units desired
Dimensional Analysis
is one of the common measurements
done in the laboratory. It involves getting Mass, Volume and
Temperature of an Object.
Density measurement
amount of space occupied by a substance. In
liquids, the volume can be determined using a graduated cylinder,
while solids, the volume can be determined by two methods.
Volume
is the ratio of the mass of an object to the
volume it occupies.
