Author: eduKate Asia
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PSLE Science Reality Lab Vol No.312 | “Leaf Area Index = 3” — Does That Mean Three Leaves per Square Metre or 300% Ground Cover?
A massive Primary 5/6 PSLE Science Reality Lab guide to Leaf Area Index: why LAI = 3 is an area ratio, not three leaves per square metre or 300% canopy cover, and how scale, composites and retrieval quality bound the claim.
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PSLE Science Reality Lab Vol No.311 | “Transit Depth = 1%” — Is the Planet 1% as Wide as Its Star?
A massive Primary 5/6 PSLE Science Reality Lab guide to exoplanet transit depth: why a 1% dip in starlight is not a planet that is 1% as wide as its star, and how geometry, stellar size, dilution and repeated evidence bound the inference.
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PSLE Science Reality Lab Vol No.310 | “CO₂ = 800 ppm” — Is That 800 mg of CO₂ per Cubic Metre?
A massive Primary 5/6 PSLE Science Reality Lab guide to CO₂ ppm: why 800 ppm is an amount-fraction statement, not 800 mg/m³, and how basis, denominator, instrument method, temperature and pressure bound comparisons.
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PSLE Science Reality Lab Vol No.309 | “20 Heating Degree Days” — Were There 20 Cold Days?
A massive Primary 5/6 PSLE Science Reality Lab guide to heating degree days: why “20 degree days” is accumulated temperature departure from a stated base, not a count of 20 cold calendar days.
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PSLE Science Reality Lab Vol No.308 | “WBGT = 30°C” — Did One Thermometer Measure 30°C Air?
A massive Primary 5/6 PSLE Science Reality Lab guide to Wet Bulb Globe Temperature: why WBGT in °C is a derived heat-stress metric, not an ordinary air-temperature reading from one thermometer.
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PSLE Science Reality Lab Vol No.307 | “Noise Dose = 100%” — Is the Sound Level 100 dBA?
A massive Primary 5/6 PSLE Science Reality Lab guide to noise-dose percentages: why 100% dose is accumulated exposure against a stated criterion, not a 100 dBA sound-level reading.
