Category: Science
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PSLE Science Reality Lab Vol No.100 | “The Corrected Value Is −2” — Can the Physical Amount Really Be Negative?
A Primary 5/6 PSLE Science Reality Lab guide to background subtraction: learn why a processed result can become negative even when the underlying physical amount cannot, and why raw signal, background estimate and corrected value must stay separate.
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PSLE Science Reality Lab Vol No.099 | “Plant-Based Plastic” — Does Plant-Based Mean Biodegradable?
A Primary 5/6 PSLE Science Reality Lab guide to environmental material claims: learn why plant-based or biobased origin does not automatically prove that a plastic is biodegradable, compostable or suitable for a particular disposal route.
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PSLE Science Reality Lab Vol No.098 | “Tested in Triplicate” — Were There Three Independent Samples, or Three Readings of One Sample?
A Primary 5/6 PSLE Science Reality Lab guide to the phrase “tested in triplicate”: learn why three readings of one prepared sample are not automatically three independent samples or three independent confirmations.
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PSLE Science Reality Lab Vol No.097 | “1, 10, 100, 1000” — Is This a Logarithmic Axis Rather Than Equal Steps?
A Primary 5/6 PSLE Science Reality Lab guide to logarithmic axes: learn why equal visual spacing can represent equal multiplication rather than equal addition, and how that changes scientific interpretation.
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PSLE Science Reality Lab Vol No.096 | “The Sensor Responded” — Could Something Else Trigger the Same Signal?
A Primary 5/6 PSLE Science Reality Lab guide to sensor selectivity: learn why a positive response is not automatically unique proof of one target and how competing causes can be checked.
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PSLE Science Reality Lab Vol No.094 | “Detected” — Does That Tell You How Much Is There?
A Primary 5/6 PSLE Science Reality Lab guide to detection versus measurement: learn why finding a signal can support “present” without yet supporting a trustworthy claim about how much is there.
