Category: Science
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PSLE Science Reality Lab Vol No.106 | “The Sample Sat for Three Days Before Testing” — Does the Result Still Describe What Was Collected?
A Primary 5/6 PSLE Science Reality Lab guide to sample holding time: learn why a sample can change after collection and how storage, preservation and timing affect what a later measurement can support.
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PSLE Science Reality Lab Vol No.105 | “The Concentration Doubled” — Does That Prove Twice as Much Substance Was Added?
A Primary 5/6 PSLE Science Reality Lab guide to concentration claims: learn why concentration can rise because volume falls, so “twice as concentrated” does not automatically mean twice as much substance was added.
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PSLE Science Reality Lab Vol No.104 | “Moisture Content = 20%” — 20% of the Wet Sample or the Dry Matter?
A Primary 5/6 PSLE Science Reality Lab guide to percentage basis: learn why one sample can have different moisture percentages depending on whether the denominator is wet mass or dry matter.
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PSLE Science Reality Lab Vol No.103 | “The Water Was Filtered Before Testing” — Does the Result Describe the Original Sample?
A Primary 5/6 PSLE Science Reality Lab guide to sample preparation: learn why a result measured after filtration belongs first to the filtered fraction, not automatically to every part of the original sample.
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PSLE Science Reality Lab Vol No.102 | “Both Results Say 50” — Are the Units Actually the Same?
A Primary 5/6 PSLE Science Reality Lab guide to equal-looking numbers with different units: learn why “50” and “50” are not scientifically equal until the quantities, prefixes and units are aligned.
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PSLE Science Reality Lab Vol No.101 | “Both Lab Reports Say 9/10” — Were They Measuring the Same Thing With the Same Test?
A Primary 5/6 PSLE Science Reality Lab guide to scientific comparability: learn why two identical-looking scores such as 9/10 are not automatically comparable when the tests, properties, scales, references or conditions differ.
