Author: eduKate Asia
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PSLE Science Reality Lab Vol No.179 | “Water Hardness = 180 mg/L as CaCO₃” — Is There 180 mg/L of Calcium Carbonate in the Water?
A massive Primary 5/6 PSLE Science Reality Lab guide to water-hardness reports: learn why “180 mg/L as CaCO₃” is an equivalent hardness reporting basis, not automatic proof that 180 mg/L of calcium carbonate itself is dissolved in the water.
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PSLE Science Reality Lab Vol No.178 | “Carbon Footprint = 1 kg CO₂e” — Did the Product Emit Exactly 1 kg of CO₂?
A massive Primary 5/6 PSLE Science Reality Lab guide to carbon-footprint labels: learn why 1 kg CO₂e is a common climate-impact comparison unit, not automatic proof that exactly 1 kg of carbon dioxide gas was physically emitted.
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PSLE Science Reality Lab Vol No.177 | “Bulb Output = 800 Lumens” — Is Every Surface Receiving 800 Lux?
A massive Primary 5/6 PSLE Science Reality Lab guide to lighting claims: learn why 800 lumens is total visible light output, not 800 lux arriving at every surface.
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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.
