Category: Science
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PSLE Science Reality Lab Vol No.271 | “RMSE = 2°C” — Were All Forecasts Within 2°C of the Observations?
A massive PSLE Science Reality Lab guide for Primary 5/6 learners on reading RMSE correctly: a summary of forecast errors is not a maximum-error guarantee or a percent-correct score.
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PSLE Science Reality Lab Vol No.270 | “Satellite Rainfall = 25 mm” — Did a Rain Gauge Measure 25 mm at Every Point?
A massive PSLE Science Reality Lab guide for Primary 5/6 learners on reading satellite rainfall estimates without mistaking gridded precipitation products for direct rain-gauge measurements at every point.
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PSLE Science Reality Lab Vol No.269 | “5-Tick Energy Label” — Does It Always Use Less Electricity Than a 4-Tick Appliance?
A massive Primary 5/6 PSLE Science Reality Lab guide to Singapore Energy Label tick ratings: separate relative efficiency from total electricity use, capacity and actual usage.
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PSLE Science Reality Lab Vol No.268 | “The Headline Says ‘Up 200%’” — How Big Was the Starting Amount?
A massive Primary 5/6 PSLE Science Reality Lab guide to percent-change headlines: recover the starting baseline and separate relative change from absolute magnitude before judging a claim.
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PSLE Science Reality Lab Vol No.267 | “Population Estimate = 1,200 Animals” — Were 1,200 Animals Actually Counted?
A massive Primary 5/6 PSLE Science Reality Lab guide to wildlife population estimates: separate directly observed animals from abundance inferred through sampling and models.
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PSLE Science Reality Lab Vol No.266 | “Above the Screening Level” — Does That Prove Harm Has Already Happened?
A massive Primary 5/6 PSLE Science Reality Lab guide to environmental screening levels: learn why an exceedance can justify further evaluation without automatically proving harm or a cleanup requirement.
