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when conducting an experiment repetition is important also

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repetition is hugely important did we mention the repetitions a big deal like [Man writing on chalkboard]

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well it bears repeating the reason is that if you only perform an experiment

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one or two times there might have been some reason you got the results you did

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other than those caused by your independent variable the more times you

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repeat an experiment the more you reduce the chances that your data will get too [Man repeating scientific experiment]

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messed up there are three main types of errors that can contribute to skewed

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results the first is a careless error you know all about carelessness you [Types of errors appear and house on fire]

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learned that lesson last year during what your family likes to call the great

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Christmas tree fiasco while careless errors can happen in the lab - maybe

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something gets knocked over or spilled or maybe you wrote down the wrong number [Man spills over beaker]

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when taking a measurement or maybe you wrote the right number but your

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handwriting is worse than a monkey's and afterwards that you couldn't tell what [Monkey holding sheet of paper]

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in the world that was supposed to be well the best way to guard against

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making this sort of error is to be careful when P alert be focused and

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don't swing your arms about wildly in the presence of glassware the second [Man spills glassware on the floor]

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common type of error is the systematic variety you might be careful as all

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get-out but if your equipment is screwed up somehow

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if something's not calibrated correctly or if your thermometer thinks everything [Water boiling and person dips in thermometer]

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is 45 degrees fahrenheit you've got a problem on your hands

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repeating an experiment helps you to spot these types of errors at which

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point you can fix your equipment or and preferably switch it out with something [Man gives equipment gift to scientist]

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new bright and shiny finally there's always the possibility

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of random errors maybe a draught of wind came along and subdued the flame of your [Wind travels to bunsen burner]

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Bunsen burner a tad or maybe you've got a weird batch of a certain chemical that

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was mixed with apple juice for some reason your lab partner is a bit of a

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prankster after all anything unexpected or unaccounted for that might mess with

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your results is a random error not much you can do about them sometimes on an

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individual basis but if you're doing each experiment [Man pours into beaker and explodes]

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multiple times you'll be able to throw out your bad data with the bathwater by

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the way a science lab is an awful place to take a bath it's called an emergency

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shower for a reason [Man taking an emergency shower]

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