Category: Science
-
PSLE Science Reality Lab Vol No.182 | “LED Colour Temperature = 3000 K” — Is the Bulb Really 3000 K Hot?
A Primary 5/6 PSLE Science Reality Lab guide to LED colour-temperature labels: learn why 3000 K describes a light’s colour appearance, not the physical operating temperature of the bulb.
-
PSLE Science Reality Lab Vol No.181 | “Sound Level = 60 dB” — Is That Only Twice the Sound Intensity of 30 dB?
A massive Primary 5/6 PSLE Science Reality Lab guide to decibel displays: learn why the dB scale is logarithmic, so 60 dB is not merely twice the sound intensity of 30 dB, and why weighting, distance and measurement conditions matter.
-
PSLE Science Reality Lab Vol No.180 | “Solar Panel Rated 400 W” — Does It Produce 400 W All Day?
A massive Primary 5/6 PSLE Science Reality Lab guide to solar-panel ratings: learn why a 400 W nameplate is a standard-condition power rating, not a promise of 400 W all day or a fixed amount of energy regardless of sunlight and temperature.
-
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.
-
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.
-
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.
