GCSE Science

AQA Science: Glossary - True Value

This is the value that would be obtained in an ideal measurement. An ideal measurement is one that would have no errors at all.

In other words, this is a value that is perfectly accurate.

e.g. If a 1 metre ruler is entirely accurate in length then it will not be even a tiny amount more or less than 1 metre. The problem is that we cannot measure with 100% accuracy! Even if we knew how many atoms there were along the length of the ruler, we can never expect to know their separation and size exactly either.

In other words, the 'true value' is hypothetical no such thing can actually be measured.


Accuracy
Calibration
Data
Errors*
Evidence
Fair test
Hypothesis
Interval
Precision
Prediction
Range
Repeatable
Reproducible
Resolution
Sketch Graph
True Value
Uncertainty
Validity
Valid Conclusion
Variables*
* These terms have a number of related items.

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