Category: Science
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PSLE Science Reality Lab Vol No.356 | “U = 0.4°C, k = 2” — Does k = 2 Mean the Thermometer Can Be Wrong by 2°C?
A massive Primary 5/6 PSLE Science Reality Lab guide to calibration certificates: learn why expanded uncertainty U carries the measurement unit while k is a dimensionless coverage factor, not an extra error such as ±2°C.
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PSLE Science Reality Lab Vol No.355 | “ShakeMap Intensity = VI” — Was It a Magnitude 6 Earthquake?
A massive Primary 5/6 PSLE Science Reality Lab guide to ShakeMap intensity: learn why MMI VI describes local shaking and effects rather than a magnitude 6 earthquake, and how station data, estimates, location and map limits shape the evidence.
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PSLE Science Reality Lab Vol No.354 | “Baseflow Index = 60%” — Is 60% of the River Groundwater at Every Moment?
PSLE Science Reality Lab: learn how Baseflow Index summarises estimated baseflow as a share of streamflow over a defined period without meaning 60% of the river is groundwater at every moment.
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PSLE Science Reality Lab Vol No.353 | “D50 = 20 µm” — Are Half the Particles Exactly 20 µm Wide?
PSLE Science Reality Lab: learn how D50 summarises a particle-size distribution without meaning every particle is 20 µm or half the particles are exactly that size.
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PSLE Science Reality Lab Vol No.352 | “LAeq = 70 dB” — Was the Sound 70 dB the Whole Time?
PSLE Science Reality Lab: learn how LAeq summarises changing sound over a stated interval without implying that the sound stayed at one constant level or never had louder peaks.
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PSLE Science Reality Lab Vol No.351 | “100 MPGe” — Did the Electric Car Use One Gallon of Gasoline to Travel 100 Miles?
PSLE Science Reality Lab: learn how to read MPGe as an energy-equivalent comparison for electric vehicles, not actual gasoline consumed, guaranteed range or a direct cost figure.
