Extra / Supplementary Science
Curious ideas beyond the syllabus, grouped by theme.
Why Does Ice Float?Most solids sink in their own liquid, but ice floats. How open hexagons make ice less dense, and why that keeps lakes alive.Heat and matter · Physics · simulation
Why Is Ice Slippery?Not because your weight melts it: that lowers the melting point by only a fraction of a degree. A thin liquid-like surface layer (premelting) and frictional melting do the work, and scientists still debate the details.Heat and matter · Physics · simulation
Why Metal Feels Colder than WoodA steel railing and a wooden bench at the same 10 °C, yet the steel feels icy. Skin senses how fast heat leaves it, and metal conducts heat hundreds of times faster than wood.Heat in everyday life · Physics · simulation
Why the Sky is Blue and Sunsets are RedAir scatters blue light far more than red. Blue fills the sky by day; at sunset the long path through the air removes the blue, and red and orange reach you.Light and colour · Physics · simulationNo topic matches. Try a shorter word.