Category: Science
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PSLE Science Reality Lab Vol No.320 | “Fire Perimeter = 10,000 ha” — Did All 10,000 ha Burn?
PSLE Science Reality Lab: learn why a wildfire perimeter describes a mapped boundary, not proof that every hectare inside burned or burned equally, and how burn-severity evidence changes the conclusion.
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PSLE Science Reality Lab Vol No.319 | “NDVI = 0.8” — Is 80% of the Ground Covered by Vegetation?
PSLE Science Reality Lab: learn how to read NDVI as a unitless red-versus-near-infrared vegetation index, not an 80% ground-cover measurement, and test what a satellite vegetation map can really support.
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PSLE Science Reality Lab Vol No.318 | “80% Biobased Content” — Is 80% of the Whole Product’s Mass Plant Material?
PSLE Science Reality Lab: learn why a certified 80% biobased-content label can describe the share of organic carbon from renewable biological sources rather than 80% of the whole product’s mass.
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PSLE Science Reality Lab Vol No.317 | “Planetary Kp = 7” — Is Earth’s Magnetic Field Seven Times More Disturbed Than at Kp 1?
PSLE Science Reality Lab: learn how to read Planetary Kp as a derived quasi-logarithmic three-hour geomagnetic index, not a linear raw measurement or a seven-times multiplier at Kp 7.
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PSLE Science Reality Lab Vol No.316 | “Water Storage Anomaly = −10 cm” — Did the Groundwater Table Fall by 10 cm?
PSLE Science Reality Lab: learn why a GRACE-style water-storage anomaly in centimetres represents broad land-water mass change as equivalent water thickness, not a direct groundwater-table drop at every location.
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PSLE Science Reality Lab Vol No.315 | “10-10-10 Fertilizer” — Is It 10% Nitrogen, 10% Elemental Phosphorus and 10% Elemental Potassium?
PSLE Science Reality Lab: learn how to read an N-P-K fertilizer grade by checking the label convention, chemical basis, denominator and evidence boundary before treating 10-10-10 as three elemental percentages or a plant-growth guarantee.
