Category: Science
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PSLE Science Reality Lab Vol No.168 | “This City Is Twice as Bright at Night” — Does That Mean Twice as Many People Live There?
A Primary 5/6 evidence guide to satellite nighttime-lights images: learn why brightness measures detected light, not a direct headcount, and how to test population claims against alternative light sources and independent evidence.
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PSLE Science Reality Lab Vol No.167 | “The Epicentre Dot Is Right Here” — Is the Earthquake Location Exact to the Dot?
A Primary 5/6 evidence guide to earthquake maps: learn why an epicentre marker represents an estimated location with uncertainty, not an infinitely exact point on the ground.
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PSLE Science Reality Lab Vol No.166 | “Sea Ice Concentration = 80%” — Is the Ice 80% Thick?
A Primary 5/6 evidence guide to sea-ice concentration maps: learn why 80% concentration describes surface-area coverage inside a grid cell, not ice thickness, and how to keep area, extent and thickness separate.
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PSLE Science Reality Lab Vol No.165 | “Feels Like 42°C” — Did a Thermometer Measure 42°C?
A Primary 5/6 evidence guide to weather-app “feels like” values: separating measured air temperature and humidity from the derived heat index, and checking the conditions behind the number.
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PSLE Science Reality Lab Vol No.164 | “Category 4 Hurricane” — Does the Category Tell You the Storm’s Size, Rainfall and Surge?
A Primary 5/6 evidence guide to hurricane categories: what the Saffir-Simpson Hurricane Wind Scale actually classifies, and why category is not a shortcut for storm size, rainfall or storm surge.
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PSLE Science Reality Lab Vol No.163 | “Sea-Surface Temperature = 30°C” — Is the Ocean 30°C All the Way Down?
A Primary 5/6 evidence guide to sea-surface temperature maps: what the sensor represents near the surface, what it does not tell us about deeper water, and how to keep a claim inside the measured layer.
