Category: Science
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PSLE Science Reality Lab Vol No.230 | “Germination = 90%” — Will Exactly 9 of Every 10 Seeds Grow?
A Primary 5/6 PSLE Science Reality Lab guide to seed-packet germination percentages: learn why 90% is a result from a defined sample test under stated conditions, not a guarantee that exactly 9 of every 10 seeds in every packet or planting will germinate.
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PSLE Science Reality Lab Vol No.229 | “Pasteurized” — Does That Mean the Milk Is Sterile?
A Primary 5/6 PSLE Science Reality Lab guide to the word “pasteurized”: learn why a validated heat treatment that controls harmful germs is not the same scientific claim as sterile, germ-free or automatically shelf-stable.
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PSLE Science Reality Lab Vol No.228 | “Wildfire 80% Contained” — Does That Mean 80% of the Fire Is Out?
A Primary 5/6 PSLE Science Reality Lab guide to wildfire containment percentages: learn why 80% contained refers to containment around the fire perimeter, not to 80% of the fire being extinguished.
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PSLE Science Reality Lab Vol No.227 | “L70 = 50,000 h” — Does the LED Suddenly Die at Hour 50,000?
A Primary 5/6 PSLE Science Reality Lab guide to LED L70 claims: learn why L70 describes a lumen-maintenance threshold under defined evidence conditions, not a timer that makes an LED suddenly fail at a stated hour.
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PSLE Science Reality Lab Vol No.226 | “IP68” — Does That Mean the Device Is Waterproof in Any Situation?
A Primary 5/6 PSLE Science Reality Lab guide to IP68 claims: learn how to read an ingress-protection code as evidence from defined test conditions, not as a universal promise that a device is waterproof in every situation.
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PSLE Science Reality Lab Vol No.225 | “High Tide = 1.8 m” — Is the Sea 1.8 m Deep?
A Primary 5/6 PSLE Science Reality Lab guide to tide-height claims: learn why tide height is measured from a stated reference datum, not total water depth, and why prediction can differ from observation.
