evaluating an investigation(unit 3)

Question 1

what can you improve in an investigation

Answer 1

equipment
reactants
method
techniques

Question 2

explain anomalous data

Answer 2

it does not fit the pattern of other results

when plotted on the graph it does not lie close to the line/curve of best fit

Question 3

what causes anomalous data

Answer 3

not following method correctly
inaccurate measuring/recording of data
impurities

Question 4

sources if errors

Answer 4

systematic errors- this is an error that is built in to the method or equipment you are using for example if balance is not correctly calibrated. this can be fixed by correctly calibrating
random error- these are due to not following the method correctly and can be minimised by repeating results and taking averages.
misreading of observations can cause quantitative error