Category: Science
-
PSLE Science Reality Lab Vol No.206 | “GPS Accuracy = 5 m” — Is Your True Position Guaranteed to Be Inside a 5 m Circle?
A Primary 5/6 PSLE Science Reality Lab guide to GPS accuracy: learn why a 5 m accuracy display is an estimate, not a guarantee that the true position must lie inside one fixed circle.
-
PSLE Science Reality Lab Vol No.205 | “UV Index = 8” — Is That 8% UV or Eight Times UV Index 1?
A massive Primary 5/6 PSLE Science Reality Lab guide to UV Index displays: learn why UVI 8 is not 8% UV, what the index is built from, when numerical comparison is meaningful, and why location, time, clouds and exposure claims still need evidence.
-
PSLE Science Reality Lab Vol No.204 | “6 Air Changes per Hour” — Is Every Air Molecule Replaced Six Times?
A massive Primary 5/6 PSLE Science Reality Lab guide to air changes per hour: learn why 6 ACH is an equivalent ventilation rate based on airflow and room volume, not proof that every molecule is replaced six times or that a room becomes instantly contaminant-free.
-
PSLE Science Reality Lab Vol No.203 | “12 °Brix” — Is the Drink Exactly 12% Sugar?
A massive Primary 5/6 PSLE Science Reality Lab guide to °Brix: learn why a refractometer reading is a soluble-solids or sucrose-equivalent measurement, not automatic proof that every complex drink contains exactly that percentage of sugar.
-
PSLE Science Reality Lab Vol No.202 | “MERV 13 Filter” — Does 13 Mean It Captures 13% of Particles?
A massive Primary 5/6 PSLE Science Reality Lab guide to MERV ratings: learn why MERV 13 is a test-derived filter-performance category, not 13% capture, and how particle size, airflow, installation and room conditions limit the claim.
-
PSLE Science Reality Lab Vol No.201 | “Heat-Pump COP = 3.5” — Did It Create 3.5 Units of Heat From 1 Unit of Electricity?
A massive Primary 5/6 PSLE Science Reality Lab guide to heat-pump COP: learn why COP 3.5 is a ratio of heating or cooling effect to work input, not energy creation, why operating conditions matter, and how to compare efficiency claims without confusing capacity, electricity use or seasonal performance.
