Author: eduKate Asia
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PSLE Science Reality Lab Vol No.300 | “Geiger Counter = 120 CPM” — Is That 120 µSv/h of Radiation Dose?
A massive Primary 5/6 PSLE Science Reality Lab guide to Geiger-counter displays: why counts per minute are detector count rate, not automatically microsieverts per hour or radiation dose, and what calibration, background and geometry evidence is needed.
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PSLE Science Reality Lab Vol No.299 | “Calibration Chart: R² = 0.99” — Is the Method 99% Accurate?
A massive Primary 5/6 PSLE Science Reality Lab guide to R² on calibration and model charts: why R² = 0.99 describes fit, not 99% measurement accuracy, and what reference, residual, range and independent-check evidence is still needed.
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PSLE Science Reality Lab Vol No.298 | “Catch per Unit Effort Went Up” — Does That Prove There Are More Fish?
A massive Primary 5/6 PSLE Science Reality Lab guide on catch per unit effort: how a relative abundance index differs from a direct fish census and why catchability and standardisation matter.
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PSLE Science Reality Lab Vol No.297 | “Treadwear 400” — Will the Tire Last Exactly Four Times as Long on Any Road?
A massive Primary 5/6 PSLE Science Reality Lab guide on treadwear grades: how a comparative standardized rating differs from guaranteed mileage or exact real-road lifetime.
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PSLE Science Reality Lab Vol No.296 | “9H Pencil Hardness” — Is This Coating as Hard as Mohs 9?
A massive Primary 5/6 PSLE Science Reality Lab guide on 9H pencil-hardness claims: how a coating test differs from Mohs mineral hardness and from a universal scratchproof promise.
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PSLE Science Reality Lab Vol No.295 | “Sensor Sensitivity = 20 mV/°C” — Is the Sensor 20% Accurate?
A massive Primary 5/6 PSLE Science Reality Lab guide on reading sensor sensitivity correctly: why mV/°C describes how output changes with the measured quantity, not a percentage accuracy claim.
