SCIENTIFIC MEASUREMENT Flashcards
crucial integration between chemistry and mathematics
Measurement
quantitative comparison of an object’s physical quantity that involves a number or unit
Measurement
is meaningless without a unit
number
grouped into systems of measurements
unit
2 common systems of measurements
- English system of measurement
- International System of Units
ancient system of measuring in the Philippines
based on the human body parts to solve practical problems
is an indirect conversion, requiring more than one conversion factor
multistep conversion
digits that are considered in a measurement taken, whether with a great degree of certainty or with a little certainty
significant figures
temperature-dependent physical quantity that is specific to pure substances and is specifically defined as the mass per unit volume
density
measures the compactness of an object or the quantity per unit volume
density
length of a forefinger
timuro
breath of a finger
dali
width of a palm
dangkal or dama
distance between the tip of the middle finger of 2 extended arms
dipa
length of a foot
talampakan
single stride
hakbang
a handful
dakot
container for mangoes, tomatoes and salt
kaing
container for rice
salop or kaban
a jar
gusi
a scoop
salok
The English System of measurement is generally used in what countries?
Burma, Liberia and USA
meaning of SI
Systeme international d’unites
fundamental units of measurement from which other units can be derived
base units
7 fundamental physical quantities
mass
electrical current
temperature
time
amount of substance
length
luminous intensity
words or letters that precede a base unit in the SI system
SI prefixes
combinations of physical quantities
derived quantities
unit derived from 2 or more base units
derived units
when a unit of length is multiplied by another unit of length
area
length is multiplied by the same quantity 3 times
volume
product of mass and acceleration
force
product of 2 dimensions of length
area
ratio of force and area
pressure
mathematical statement of 2 equivalent measurements of different units that can be expressed in a fraction form
conversion factor
calculation that involves a conversion factor
dimensional analysis
known as a factor-label method
dimensional analysis
one essential physical quantity in the study of kinetic energy
temperature
quantitative measure of the hotness or coldness of matter
temperature
proposed the Fahrenheit scale
Daniel Gabriel Fahrenheit
he introduced celsius
Anders Celsius
proposed the Rankine scale
William John Macquorn Rankine
proposed the Kelvin scale
William Thomson
quantitative term used in determining the degree of conformity of a test result to a true or accepted value
accuracy
also known as average
mean
is the quotient of the summation of all data and numbers of the data involved
mean
refers to the absolute value of the difference between the theoretical value
error
pertains to the consistency of achieving the same results repeatedly even if the value is far from the true value
precision
describes how spread out or distributed the data are
standard deviation
simplified expression for a very large or very small number or quantity
scientific notation
