Evaluation and Conclusion (VCE SSCE Chemistry): Quizzes

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Evaluation and Conclusion
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What characterises systematic errors in an experiment?

Results consistently higher or lower

What do random errors primarily affect in experimental results?

The precision of results

How do mistakes differ from errors in experiments?

Mistakes produce outliers to be excluded

Which method best minimises random errors?

Repeat trials and calculate average

Why is water displacement inaccurate for measuring CO2\text{CO}_2 volume?

CO2\text{CO}_2 is slightly soluble in water

What does a yellow, sooty flame indicate during hydrocarbon combustion?

Incomplete combustion is occurring

How should results be compared to accepted values in a conclusion?

Quantitatively with percentage differences

In which tense and person should conclusions be written?

Past tense and third person

Which action helps minimise systematic errors?

Calibrate instruments properly

How should the aim be presented in a conclusion?

Restated in past tense

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