Category: Science
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PSLE Science Reality Lab Vol No.162 | “Significant Wave Height = 2 m” — Is Every Wave 2 m High?
A Primary 5/6 evidence guide to reading significant wave height correctly: a summary of a changing wave field, not the height of every individual wave.
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PSLE Science Reality Lab Vol No.161 | “Magnitude 6.0” — Did Every Place Experience the Same Shaking?
PSLE-SCI-REALITY-0161. A Primary 5/6 guide to earthquake headlines and maps: why one magnitude value describes the event while local shaking intensity can vary with distance, depth and ground conditions.
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PSLE Science Reality Lab Vol No.160 | “Satellite NO₂ Is High Here” — Is That the Same as Ground-Level NO₂ Concentration?
PSLE-SCI-REALITY-0160. A Primary 5/6 guide to satellite nitrogen-dioxide maps: why a tropospheric NO₂ column is not automatically the same as an exact ground-level concentration, and how units, time and vertical distribution affect the claim.
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PSLE Science Reality Lab Vol No.159 | “This Is a Historical Weather Map” — Was Every Grid Cell Directly Measured?
PSLE-SCI-REALITY-0159. A Primary 5/6 guide to historical weather reanalysis: why a value in every grid cell can be a model-assisted estimate constrained by observations rather than a direct measurement at every location.
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PSLE Science Reality Lab Vol No.158 | “This Red Square Is a Fire Hotspot” — Is the Whole Square Burning?
PSLE-SCI-REALITY-0158. A Primary 5/6 guide to satellite fire-hotspot maps: why a red pixel marks a thermal detection footprint, not proof that the whole square is burning or that its centre is the exact fire location.
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PSLE Science Reality Lab Vol No.157 | “100% Inspected” — Does That Guarantee Every Defect Was Found?
PSLE-SCI-REALITY-0157. A Primary 5/6 guide to “100% inspected” quality claims: why checking every unit does not guarantee every defect was detected, and why method capability still matters.
