Category: PSLE Primary Science
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PSLE Science Reality Lab Vol No.392 | “Mean ± SEM” — Do Those Tiny Error Bars Show How Much the Individual Results Varied?
A Primary 5/6 evidence guide to reading mean ± SEM graphs without mistaking small standard-error bars for the spread of individual observations or proof of accuracy.
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PSLE Science Reality Lab Vol No.391 | “Dissolved Metal = 8 µg/L” — Is That the Total Metal in the Water?
A Primary 5/6 evidence guide to reading dissolved-metal results as method-defined sample fractions rather than silently treating them as total concentration in the whole water sample.
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PSLE Science Reality Lab Vol No.390 | “Checked Against Ground Truth” — Does Ground Truth Mean Error-Free Truth?
A Primary 5/6 evidence guide to treating ground or reference data as strong comparison evidence without assuming the reference itself is perfectly error-free.
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PSLE Science Reality Lab Vol No.389 | “Model Run: 00Z; Valid: 12Z” — Which Time Does the Forecast Describe?
A Primary 5/6 evidence guide to separating forecast initialization or model-run time from the later valid time that a predicted field describes.
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PSLE Science Reality Lab Vol No.388 | “Accuracy: ±1% Full Scale” — Is That ±1% of Every Reading?
A Primary 5/6 evidence guide to reading percent-of-full-scale instrument specifications without mistaking them for percent-of-reading accuracy.
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PSLE Science Reality Lab Vol No.387 | “Satellite Data: Level 3” — Does Level 3 Mean It Is More Accurate Than Level 2?
A Primary 5/6 evidence guide to reading satellite-data processing levels without mistaking Level 3 for an accuracy, quality or trust score.
