Author: eduKate Asia
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PSLE Science Reality Lab Vol No.420 | “Aboveground Biomass = 150 Mg/ha” — Did Scientists Cut Down and Weigh Every Tree?
A massive Primary 5/6 evidence guide to forest biomass maps: how field observations, lidar measurements, sampling and models can produce biomass estimates without weighing every tree in every mapped area.
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PSLE Science Reality Lab Vol No.419 | “River Discharge = 120 m³/s at 06:00” — Was 120 m³/s Directly Measured at That Exact Moment?
A massive Primary 5/6 evidence guide to river-discharge dashboards: why a value shown at one timestamp may be estimated from continuously measured stage and a site-specific rating curve rather than directly measured at that exact moment.
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PSLE Science Reality Lab Vol No.418 | “Net Weight 500 g” — Was Every Pack Filled to Exactly 500.0 g?
A massive Primary 5/6 evidence guide to net-weight labels: why a printed 500 g declaration does not prove every individual package was filled to exactly 500.0 g.
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PSLE Science Reality Lab Vol No.417 | “The Microscope Image Is Purple and Pink” — Were the Cells Naturally Those Colours?
A massive Primary 5/6 evidence guide to stained microscope images: why purple and pink H&E colours can come from laboratory dyes rather than the natural colour of tissue.
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PSLE Science Reality Lab Vol No.416 | “This Hillshade Is Dark on One Side” — Was That Slope in Shadow When the Data Were Collected?
A massive Primary 5/6 evidence guide to hillshade maps: why dark and bright terrain tones are usually calculated from elevation and chosen illumination, not observed sunlight or shadow.
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PSLE Science Reality Lab Vol No.415 | “Waterproof Fabric = 10,000 mm Hydrostatic Head” — Can You Take It 10 m Underwater?
A massive Primary 5/6 evidence guide to hydrostatic-head waterproof fabric claims: why 10,000 mm is a controlled fabric test result, not a universal 10 m immersion guarantee.
