Bio command terms, tools, sig figs, uncertainty

erlenmeyer flask

petri dish

Analog tool uncertainty

½ smallest measurement

Adding uncertainty

add uncertainties to get total (twice on ruler)

Electronic uncertainty

smallest value

stopwatch minimum uncertainty

± 0.3 seconds

Discrete count

During trials, uncertainty is half the range of the trials

4 rules of counting sign figs

1. non zeros are sig

2. zeros between non zeros are sig

3. zeros to the left are never sig

4. zeros to the right of a decimal are sig

sig figs for multiplication and division

round to the least number of sig figs

sig figs for addition and subtraction

round to the least number of decimal places

sig figs for addition/subtraction uncertainties

add uncertainties

sig figs for multiplication/division uncertainties

add proportion of the uncertainties to their og numbers, then multiply by the final result number