Category: Science
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PSLE Science Reality Lab Vol No.260 | “Species Richness = 20” — Were Only 20 Organisms Counted?
Learn how to read species richness correctly: distinguish the number of species from the number of individual organisms, check sampling effort and detectability, and evaluate observed versus estimated biodiversity claims.
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PSLE Science Reality Lab Vol No.259 | “Land Surface Temperature = 50°C” — Is the Air Temperature 50°C?
Learn why satellite land surface temperature is not the same as weather-report air temperature, and how to evaluate temperature maps by checking object, place, time and method.
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PSLE Science Reality Lab Vol No.258 | “Aerosol Optical Depth = 0.8” — Is That the Ground-Level PM2.5 Concentration?
Learn how to distinguish satellite aerosol optical depth from ground-level PM2.5 concentration, trace the evidence bridge from optical signal to surface estimate, and evaluate what an air-quality map can actually prove.
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PSLE Science Reality Lab Vol No.257 | “Detected in 70% of Samples” — Was It Present 70% of the Time or Across 70% of the Area?
A massive Primary 5/6 Reality Lab guide to detection-frequency claims: why “detected in 70% of samples” describes a sample denominator under a sampling design, not automatically 70% of time, area, sites or population.
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PSLE Science Reality Lab Vol No.256 | “Pilot-Scale Test Removed 90%” — Will the Full-Scale System Always Remove 90%?
A massive Primary 5/6 Reality Lab guide to pilot-scale evidence: why strong performance in a smaller test system can support scale-up without guaranteeing identical full-scale performance under every real operating condition.
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PSLE Science Reality Lab Vol No.255 | “Passive Sampler Average = 5 µg/L” — Was the Water at 5 µg/L the Whole Time?
A massive student-facing PSLE Science Reality Lab guide on passive samplers: why a time-integrated result can represent an average over a deployment period without proving the concentration stayed constant or revealing short-lived peaks.
