Category: Science
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PSLE Science Reality Lab Vol No.154 | “The Lot Was Accepted” — Were All 10,000 Items Actually Tested?
PSLE-SCI-REALITY-0154. A Primary 5/6 guide to lot acceptance sampling: why an accepted production lot may be judged from a sample and does not mean every item was individually tested or defect-free.
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PSLE Science Reality Lab Vol No.153 | “Environmental DNA Detected” — Does That Prove a Living Animal Was Right There?
PSLE-SCI-REALITY-0153. A Primary 5/6 guide to environmental DNA: why a positive eDNA sample detects a biological trace but does not automatically prove a live animal’s exact current location.
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PSLE Science Reality Lab Vol No.152 | “River Level = 2.4 m” — Is the River 2.4 m Deep Everywhere?
PSLE-SCI-REALITY-0152. A Primary 5/6 guide to river dashboards: why gage height is water-surface height above a local datum, not the river’s depth everywhere or direct streamflow.
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PSLE Science Reality Lab Vol No.151 | “Accuracy ±1°C” — Is That the Uncertainty of This One Reading?
PSLE-SCI-REALITY-0151. A Primary 5/6 guide to instrument datasheets: why “accuracy ±1°C” is a performance specification and not automatically the full uncertainty of one reading.
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PSLE Science Reality Lab Vol No.150 | “Tested to a Standard” — Did the Product Pass a Requirement, or Did the Lab Follow a Test Method?
PSLE-SCI-REALITY-0150. A Primary 5/6 guide to “tested to a standard”: separate the test method, measured result, requirement and conformity decision before deciding whether a product passed.
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PSLE Science Reality Lab Vol No.149 | “Rainfall = 20 mm” — Does That Mean Water on the Ground Became 20 mm Deep?
A Primary 5/6 PSLE Science Reality Lab guide to rainfall in millimetres: learn what the depth means, why 20 mm of rain is not automatically a 20 mm puddle, how area connects depth to volume, and why rainfall amount differs from rainfall rate.
