Category: Science
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PSLE Science Reality Lab Vol No.136 | “The Laboratory Passed a Proficiency Test” — Does That Guarantee Every Future Result Will Be Right?
A Primary 5/6 PSLE Science Reality Lab guide to proficiency testing: learn what a successful inter-laboratory comparison can demonstrate—and why it cannot guarantee every future result.
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PSLE Science Reality Lab Vol No.135 | “Certified Value: 50 mg/kg” — Does Every Tiny Scoop Contain Exactly 50 mg/kg?
A Primary 5/6 PSLE Science Reality Lab guide to certified reference materials: learn why a certified value applies under stated sampling, homogeneity, uncertainty, storage and intended-use conditions—not to every microscopic portion exactly.
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PSLE Science Reality Lab Vol No.134 | “This Research Is a Preprint” — Has It Already Passed Peer Review?
A Primary 5/6 PSLE Science Reality Lab guide to preprints: learn how to evaluate early public research without dismissing it or treating it as already peer reviewed.
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PSLE Science Reality Lab Vol No.133 | “The Forecast Cone Gets Wider” — Is the Storm Itself Getting Bigger?
A Primary 5/6 PSLE Science Reality Lab guide to forecast-cone graphics: learn why a wider tropical-cyclone cone represents greater uncertainty about the future track of the storm centre, not the physical size of the storm itself.
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PSLE Science Reality Lab Vol No.132 | “Mass Balance Accounts for 92%” — Does the Missing 8% Prove It Was Destroyed?
A Primary 5/6 PSLE Science Reality Lab guide to mass-balance claims: learn why an unaccounted 8% can reflect unmeasured pathways, storage, sampling or measurement uncertainty rather than proving material was destroyed.
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PSLE Science Reality Lab Vol No.131 | “The Sample Was Homogenised” — Did Mixing Make Every Part Represent the Original Material?
A Primary 5/6 PSLE Science Reality Lab guide to homogenisation and subsampling: learn why mixing can make a small laboratory portion more representative of a collected sample while also hiding where local hotspots originally were.
