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31 terms

Measurements and Accuracy

Basic Principles of Science Biology Praxis II
Precision (precise measurements)
repeated measurements show the same result
Accuracy (accurate measurements)
how close a measurement is to the real or accepted value
SI length
meter (m)
SI mass
kilogram (kg)
SI time
second (s)
SI standard temperature
degrees Celsius (degrees C)
SI volume
liter (l)
SI electric current
ampere (A)
SI thermodynamic temperature
Kelvin (K)
SI luminous intensity
candela (cd)
SI amount of substance
mole (mol)
Fahrenheit to Celsius
Fahrenheit - 32 divided by 1.8 = Celsius
Celsius to Fahrenheit
Celsius X 1.8 +32 = Fahrenheit
significant figures
you are allowed 1 uncertain figure past marked units when measuring
Percent Accuracy
% error = /your measured result - accepted value/ divided by the accepted value X 100
scientific notation
number = a X 10(to the b power) (ex. 4,367 = 4.367 X 10 to the 4th power; 0.0000567 = 5.67 X 10 to the -5 power)
dependent variable
the variable that you measure (y-axis); it changes as a result of changing the independent variable (y is dependent on x)
independent variable
the variable that you manipulate in an experiment (x-axis)
Celsius to Kelvin
Celsius +273
tera (T)
1 trillion
giga (G)
1 billion
mega (M)
1 million
kilo (k)
1 thousand
hecto (h)
1 hundred
deka (da)
1 ten
deci (d)
1 tenth
centi (c)
1 hundredth
milli (m)
1 thousandth
micro (µ)
1 millionth
nano (n)
1 billionth
pico (p)
1 trillionth