Category: PSLE Primary Science
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PSLE Science Reality Lab Vol No.503 | “Cloud-Top Height = 12 km” — Was 12 km Directly Measured at Every Pixel?
A massive Primary 5/6 PSLE Science Reality Lab guide to satellite cloud-top height: why 12 km is a retrieved estimate from measured radiation, not a direct ruler measurement at every pixel.
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PSLE Science Reality Lab Vol No.502 | “Peak Ground Acceleration = 30% g” — Was the Ground Accelerating at 30% g the Whole Time?
A massive Primary 5/6 PSLE Science Reality Lab guide to earthquake PGA: why 30% g is peak ground acceleration, not constant shaking, a damage percentage, speed or displacement.
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PSLE Science Reality Lab Vol No.501 | “Leq = 70 dBA” — Was the Sound 70 dBA the Whole Time?
A massive Primary 5/6 PSLE Science Reality Lab guide to Leq: why 70 dBA Leq is an energy-equivalent time summary, not a constant sound level, arithmetic dB average or maximum reading.
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PSLE Science Reality Lab Vol No.499 | “Q30 Sequencing Quality” — Was the DNA Read 30 Times, or Is It 30% Accurate?
A massive Primary 5/6 PSLE Science Reality Lab guide to Q30 sequencing quality: why Q30 is a logarithmic base-call error score, not 30× coverage or 30% accuracy, and how to separate per-base quality, run summaries and DNA conclusions.
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PSLE Science Reality Lab Vol No.498 | “Occupancy Probability = 0.80” — Does the Species Occupy 80% of This Grid Cell?
A massive Primary 5/6 PSLE Science Reality Lab guide to species occupancy probability: why 0.80 is not 80% of a grid cell physically occupied, why imperfect detection matters, and how to read modelled presence evidence without turning probability into direct observation.
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PSLE Science Reality Lab Vol No.497 | “Band 13 = 10.33 µm” — Did the Satellite Measure Only One Exact Wavelength?
A massive Primary 5/6 PSLE Science Reality Lab guide to spectral-band labels: why a central wavelength such as 10.33 µm does not mean a satellite measured only one exact wavelength, and how to inspect bandpass, response curves, evidence scope and sensor metadata.
