Category: Science
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PSLE Science Reality Lab Vol No.192 | “Octane 95” — Is the Fuel 95% Octane?
A massive Primary 5/6 PSLE Science Reality Lab guide to fuel octane labels: learn why an octane rating is a standardized anti-knock performance rating, not proof that 95% of the petrol is the chemical iso-octane.
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PSLE Science Reality Lab Vol No.191 | “CADR = 300 m³/h” — Does It Clean a 300 m³ Room in One Hour?
A massive Primary 5/6 PSLE Science Reality Lab guide to clean air delivery rate: learn why 300 m³/h is an equivalent filtered-air delivery rate, not a promise that a 300 m³ room becomes completely clean in exactly one hour.
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PSLE Science Reality Lab Vol No.190 | “The Thermal Camera Says 50°C” — Did It Directly Measure the Surface Temperature?
A massive Primary 5/6 PSLE Science Reality Lab guide to thermal-camera evidence: learn how infrared radiation, emissivity, reflections, calibration and viewing conditions affect a displayed temperature before treating one coloured pixel as direct surface truth.
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PSLE Science Reality Lab Vol No.189 | “Visibility = 10 km” — Is Everything Beyond 10 km Invisible?
A Primary 5/6 PSLE Science Reality Lab guide to weather visibility: learn why 10 km visibility is not a hard wall where everything beyond 10 km disappears, and how contrast, object size and measurement conventions shape the report.
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PSLE Science Reality Lab Vol No.188 | “Snow Water Equivalent = 100 mm” — Is the Snow 100 mm Deep?
A Primary 5/6 PSLE Science Reality Lab guide to snow water equivalent: learn why 100 mm SWE describes the water stored in snow, not the physical snow depth, and how density changes the relationship.
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PSLE Science Reality Lab Vol No.187 | “Specific Conductance = 500 µS/cm” — Does That Mean 500 mg/L of Dissolved Salt?
A Primary 5/6 PSLE Science Reality Lab guide to specific conductance: learn why 500 µS/cm is an electrical-conductivity measurement, not automatically 500 mg/L of dissolved salt, and how to judge conversion claims.
