Category: Science
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PSLE Science Reality Lab Vol No.176 | “Streamflow = 100 m³/s” — Is the River Moving at 100 m/s?
A massive Primary 5/6 PSLE Science Reality Lab guide to river dashboards: learn why 100 m³/s is a volume-flow rate, not water travelling at 100 m/s.
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PSLE Science Reality Lab Vol No.175 | “HEPA Filter: 99.97%” — Will the Whole Room Become 99.97% Particle-Free?
A massive Primary 5/6 PSLE Science Reality Lab guide to HEPA claims: learn why a filter’s test efficiency is not the same as the percentage of particles removed from an entire room.
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PSLE Science Reality Lab Vol No.174 | “Precipitable Water = 40 mm” — Does That Mean 40 mm of Rain Will Fall?
A massive Primary 5/6 PSLE Science Reality Lab guide to precipitable water: learn why 40 mm describes moisture in an atmospheric column, not a promise that 40 mm of rain will fall.
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PSLE Science Reality Lab Vol No.173 | “PM2.5 = 35 µg/m³” — Are All the Particles 2.5 µm Wide?
A Primary 5/6 PSLE Science Reality Lab guide to PM2.5 displays: learn why PM2.5 names a fine-particle size class while µg/m³ reports mass concentration, not particle size or particle count.
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PSLE Science Reality Lab Vol No.173 | “Cloud Cover = 80%” — Does That Mean There Is an 80% Chance of Rain?
A Primary 5/6 PSLE Science Reality Lab guide to weather percentages: learn why 80% cloud cover describes sky coverage, not an 80% probability of rain.
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PSLE Science Reality Lab Vol No.172 | “Global Sea Level Rose 3 mm” — Did Every Coast Rise by 3 mm?
A Primary 5/6 PSLE Science Reality Lab guide to sea-level claims: learn why a global mean change is not the same numerical change at every coast, and how local land and ocean conditions affect the evidence.
