Articles
The Doppler effect: why sound changes pitch as it movesThe Doppler effect describes the change in frequency heard when a sound source and a listener move relative to each other. It explains why a passing siren…
How the Human Immune System Fights InfectionsThe human immune system is a network of organs, cells, tissues and chemical signals that protects the body from harmful microorganisms. These include viruses,…
What Causes Seasons? Earth’s Tilt ExplainedSeasons happen because Earth’s axis is tilted as our planet travels around the Sun. The axis is an imaginary line running from the North Pole to the South…
The Formation of Fossils and What They Reveal About the PastFossils are preserved remains, impressions, or traces of organisms that lived long ago. A shell inside limestone, a leaf mark in shale, a dinosaur footprint,…
How a Simple Electric Circuit WorksElectricity powers almost every aspect of daily life in Australia, from the lights in a Brisbane classroom to the trams gliding through Melbourne's CBD.…
How traits travel from parents to children: the basics of inheritanceFrom the colour of a child's eyes to the curl of their hair, the story of inheritance begins with molecules tucked inside nearly every cell. Students in…
Why Ice Floats: The Unique Properties of WaterA cube of ice placed in a glass of water rises to the surface instead of sinking to the bottom. This familiar observation reveals an unusual feature of water:…
The Parts of a Flower and Their Role in ReproductionFlowers are the reproductive structures of flowering plants, also called angiosperms. Their colours, scents and shapes help transfer pollen from one flower to…
How Ocean Currents Influence Global ClimateOcean currents are large-scale movements of seawater that transport heat, salt, nutrients and dissolved gases around the planet. Together with the atmosphere,…
Acids, bases and the pH scale explained for school chemistryPicture a glass of lemon squash on a scorching afternoon, or the white froth that rises when vinegar is poured over bicarb in a school science demo. These…