https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-434-percent-bias-not-every-reading-fixed-error/eduKate Sengkangen2026-09-19T01:27:45+00:00PSLE Science Reality Lab Vol No.434 | “Percent Bias = +2%” — Is Every Reading Exactly 2% Too High?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-4-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-433-scene-cloud-cover-not-target-area-clear/eduKate Sengkangen2026-09-19T01:25:47+00:00PSLE Science Reality Lab Vol No.433 | “Scene Cloud Cover = 10%” — Is My Target Area 90% Clear?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-8-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-432-pressure-altitude-standard-atmosphere-not-geometric-height/eduKate Sengkangen2026-09-19T01:23:44+00:00PSLE Science Reality Lab Vol No.432 | “Pressure Altitude = 2,000 ft” — Is That Exactly 2,000 ft Above Sea Level?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-4-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-431-charted-depth-datum-not-current-water-depth/eduKate Sengkangen2026-09-19T01:20:59+00:00PSLE Science Reality Lab Vol No.431 | “Charted Depth = 5 m” — Is the Water 5 m Deep Right Now?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-14-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-430-per-serving-not-whole-package-total/eduKate Sengkangen2026-09-19T00:40:22+00:00PSLE Science Reality Lab Vol No.430 | “8 g Sugar per Serving” — Does the Whole Pack Contain 8 g?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-429-map-colours-not-equal-number-ranges/eduKate Sengkangen2026-09-19T00:38:13+00:00PSLE Science Reality Lab Vol No.429 | “Four Equal-Looking Map Colours” — Are the Four Number Ranges Equal Too?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-12-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-428-drinking-water-standards-not-zero-contaminants/eduKate Sengkangen2026-09-19T00:36:21+00:00PSLE Science Reality Lab Vol No.428 | “Meets Drinking-Water Standards” — Does That Mean Every Contaminant Is Zero?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-13-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-427-24-hour-psi-not-current-concentration/eduKate Sengkangen2026-09-19T00:34:15+00:00PSLE Science Reality Lab Vol No.427 | “24-Hour PSI = 100” — Is the Pollutant Concentration 100 µg/m³ Right Now?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-2-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-426-iso-14001-not-every-product-green/eduKate Sengkangen2026-09-18T23:40:49+00:00PSLE Science Reality Lab Vol No.426 | “ISO 14001 Certified” — Does That Mean Every Product Is Environmentally Friendly?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-11-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-425-verified-epd-not-environmental-superiority/eduKate Sengkangen2026-09-18T23:37:24+00:00PSLE Science Reality Lab Vol No.425 | “Verified Environmental Product Declaration” — Does That Prove the Product Is Environmentally Better?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-5-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-424-n95-not-95-percent-every-use/eduKate Sengkangen2026-09-18T23:35:21+00:00PSLE Science Reality Lab Vol No.424 | “N95” — Does 95 Mean It Blocks 95% of Every Airborne Particle in Every Use?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-10-1.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-423-wels-four-ticks-not-one-quarter-water/eduKate Sengkangen2026-09-18T23:33:37+00:00PSLE Science Reality Lab Vol No.423 | “4-Tick WELS Washing Machine” — Does Four Ticks Mean It Uses One Quarter as Much Water?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-3-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-422-sample-rate-not-sensor-response-speed/eduKate Sengkangen2026-09-18T22:35:22+00:00PSLE Science Reality Lab Vol No.422 | “Sample Rate = 1 Reading/s” — Can the Sensor Track Every One-Second Change?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-9-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-421-accuracy-at-23c-not-all-temperatures/eduKate Sengkangen2026-09-18T22:33:03+00:00PSLE Science Reality Lab Vol No.421 | “Accuracy = ±2% RH at 23°C” — Does That Same Accuracy Claim Apply at Every Temperature?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-6-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-420-aboveground-biomass-model-estimate-not-every-tree-weighed/eduKate Sengkangen2026-09-18T22:30:06+00:00PSLE Science Reality Lab Vol No.420 | “Aboveground Biomass = 150 Mg/ha” — Did Scientists Cut Down and Weigh Every Tree?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-4-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-419-river-discharge-rating-curve-not-direct-measurement/eduKate Sengkangen2026-09-18T22:27:25+00:00PSLE Science Reality Lab Vol No.419 | “River Discharge = 120 m³/s at 06:00” — Was 120 m³/s Directly Measured at That Exact Moment?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-8-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-418-net-weight-500g-not-every-pack-exactly-500g/eduKate Sengkangen2026-09-18T21:31:17+00:00PSLE Science Reality Lab Vol No.418 | “Net Weight 500 g” — Was Every Pack Filled to Exactly 500.0 g?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-7-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-417-purple-pink-microscope-stain-not-natural-colour/eduKate Sengkangen2026-09-18T21:29:55+00:00PSLE Science Reality Lab Vol No.417 | “The Microscope Image Is Purple and Pink” — Were the Cells Naturally Those Colours?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-14-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-416-hillshade-dark-slope-not-observed-shadow/eduKate Sengkangen2026-09-18T21:28:29+00:00PSLE Science Reality Lab Vol No.416 | “This Hillshade Is Dark on One Side” — Was That Slope in Shadow When the Data Were Collected?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-415-hydrostatic-head-10000mm-not-10m-immersion-depth/eduKate Sengkangen2026-09-18T21:27:12+00:00PSLE Science Reality Lab Vol No.415 | “Waterproof Fabric = 10,000 mm Hydrostatic Head” — Can You Take It 10 m Underwater?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-8-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-414-active-noise-cancelling-40db-not-every-sound/eduKate Sengkangen2026-09-18T21:00:20+00:00PSLE Science Reality Lab Vol No.414 | “Noise Cancelling = Up to 40 dB” — Will Every Sound Become 40 dB Quieter?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-7-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-413-washing-machine-10kg-rated-load-not-any-cycle/eduKate Sengkangen2026-09-18T20:57:24+00:00PSLE Science Reality Lab Vol No.413 | “Washing Machine Capacity = 10 kg” — Does That Mean 10 kg of Any Laundry on Any Cycle?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-14-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-412-calibration-due-date-not-accuracy-guarantee/eduKate Sengkangen2026-09-18T20:55:48+00:00PSLE Science Reality Lab Vol No.412 | “Calibration Due: 30 September” — Is the Instrument Guaranteed Accurate Until That Date?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-411-dehumidifier-20l-day-test-capacity-not-home-guarantee/eduKate Sengkangen2026-09-18T20:54:12+00:00PSLE Science Reality Lab Vol No.411 | “Dehumidifier Capacity = 20 L/day” — Will It Remove 20 Litres From the Room Every Day?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-12-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-410-microwave-1000w-output-not-wall-input/eduKate Sengkangen2026-09-18T20:40:09+00:00PSLE Science Reality Lab Vol No.410 | “Microwave Oven = 1000 W” — Does It Draw Exactly 1000 W From the Wall?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-13-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-409-12-bit-4096-levels-not-16-times-accuracy/eduKate Sengkangen2026-09-18T20:38:36+00:00PSLE Science Reality Lab Vol No.409 | “12-Bit Satellite Data = 4096 Levels” — Is It 16 Times More Accurate Than 8-Bit Data?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-2-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-408-echo-sounder-depth-not-final-water-depth/eduKate Sengkangen2026-09-18T20:37:05+00:00PSLE Science Reality Lab Vol No.408 | “Echo Sounder Says 20 m” — Is the Seabed Exactly 20 m Below the Water Surface?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-11-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-407-nist-traceable-not-nist-product-approval/eduKate Sengkangen2026-09-18T20:35:36+00:00PSLE Science Reality Lab Vol No.407 | “NIST Traceable” — Did NIST Test, Approve or Certify This Instrument?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-5-2.jpg?w=150https://edukatesengkang.com/2026/09/19/psle-science-reality-lab-406-calibration-error-correction-signs/eduKate Sengkangen2026-09-18T20:34:24+00:00PSLE Science Reality Lab Vol No.406 | “Error = +0.3°C; Correction = −0.3°C” — Why Do the Signs Point Opposite Ways?https://edukatesengkang.com/wp-content/uploads/2026/09/edukateprimarysingaporetuitioncentre13-09-2026-at-16.50.43-10-1.jpg?w=150