Category: Science

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A massive PSLE Science Reality Lab guide for Primary 5/6 learners on reading T90 sensor response-time specifications without confusing dynamic response with 90% measurement accuracy, a fixed delay or full settling.

PSLE Science Reality Lab Vol No.277 | “ISO 9001 Certified” — Does That Mean Every Product Was Tested and Passed?

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A massive PSLE Science Reality Lab guide for Primary 5/6 learners on evaluating “ISO 9001 certified” claims by distinguishing certification of an organisation’s quality management system from testing or certifying every individual product.

PSLE Science Reality Lab Vol No.276 | “Round-Trip Efficiency = 90%” — Does the Battery Keep 90% of Its Charge?

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A massive PSLE Science Reality Lab guide on evaluating round-trip efficiency claims in batteries and energy storage without confusing energy returned in a charge-discharge cycle with charge retention, capacity, state of charge, health or cycle life.

PSLE Science Reality Lab Vol No.275 | “Industrially Compostable” — Will It Break Down in a Backyard Compost Bin?

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A massive PSLE Science Reality Lab guide for evaluating “industrially compostable” claims by checking the tested composting system, conditions, time, material scope and disposal route instead of assuming the item will break down anywhere.

PSLE Science Reality Lab Vol No.273 | “The Diversity Index Is Higher” — Does That Simply Mean More Species Were Counted?

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A massive PSLE Science Reality Lab guide for Primary 5/6 learners on reading biodiversity diversity-index claims without mistaking them for simple species counts, while checking evenness, sampling and scope.

PSLE Science Reality Lab Vol No.272 | “Zero Waste to Landfill” — Does That Mean the Facility Produced No Waste?

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