Author: eduKate Asia
-
PSLE Science Reality Lab Vol No.408 | “Echo Sounder Says 20 m” — Is the Seabed Exactly 20 m Below the Water Surface?
A massive Primary 5/6 evidence guide to echo-sounder depth: why a raw sonar display may require transducer-draft, sound-speed, vessel-motion and datum corrections before becoming final water depth.
-
PSLE Science Reality Lab Vol No.407 | “NIST Traceable” — Did NIST Test, Approve or Certify This Instrument?
A massive Primary 5/6 evidence guide to NIST traceability: why a traceability chain supports measurement provenance without meaning NIST tested, approved or guarantees the product.
-
PSLE Science Reality Lab Vol No.406 | “Error = +0.3°C; Correction = −0.3°C” — Why Do the Signs Point Opposite Ways?
A massive Primary 5/6 evidence guide to calibration certificates: how to distinguish measurement error, correction and uncertainty, and why a compensating additive correction can carry the opposite sign from the estimated error.
-
PSLE Science Reality Lab Vol No.405 | “ISO Class 5 Cleanroom” — Does Class 5 Mean Only Five Particles Are Allowed in the Room?
A massive Primary 5/6 evidence guide to ISO cleanroom classes: why “ISO Class 5” describes airborne-particle cleanliness under a defined concentration-based method, not five particles in the entire room.
-
PSLE Science Reality Lab Vol No.404 | “Magnitude 6.1, Then 5.8” — Did the Earthquake Become Smaller After It Happened?
A massive Primary 5/6 evidence guide to revised earthquake magnitudes: why the physical event stays in the past while the scientific estimate can improve as more seismic data and analysis become available.
-
PSLE Science Reality Lab Vol No.403 | “Brightness Temperature = −43°C” — Did a Thermometer in the Cloud Measure −43°C?
A massive Primary 5/6 evidence guide to brightness temperature: why a satellite radiometer can report a temperature-like value without directly placing a thermometer in a cloud, surface or air layer.
