Science Facts for Kids
Mind-blowing science facts
Ice floats on water because it is less dense than liquid water — an unusual property. Most solids sink in their liquid form. This quirk is vital for life, as it means lakes freeze from the top down, leaving liquid water beneath.
A single mature tree absorbs around 21 kilograms of carbon dioxide per year and releases enough oxygen for two people to breathe. The Amazon rainforest processes about 2 billion tonnes of CO₂ annually.
Many animals' eyes glow in the dark because of a reflective layer behind the retina called the tapetum lucidum, which bounces light back through the eye for a second chance at detection — greatly improving night vision.
Wind turbines convert the kinetic energy of moving air into electricity. A modern offshore wind turbine can generate enough electricity in a year to power around 1,000 average British homes.
Nuclear fission releases enormous amounts of energy by splitting large atoms, such as uranium, into smaller ones. The energy in just one kilogram of uranium is equivalent to burning about three million kilograms of coal.
Coral reefs cover less than 1% of the ocean floor but are home to more than 25% of all marine species — earning them the nickname 'the rainforests of the sea'.
Lightning rods protect buildings by providing a low-resistance path for electrical charge to flow safely into the ground, preventing lightning from heating and igniting the building materials.
In the quantum world, particles can exist in two states at once — a phenomenon called superposition — until they are observed or measured, at which point they 'choose' one state.
Plants cannot run away from danger, but they have sophisticated immune systems. When attacked by insects or disease, many plants produce toxic or bitter chemicals to defend themselves.
Sound is created by vibrations that travel as pressure waves through a medium — such as air, water, or solid materials. It cannot travel through a vacuum because there are no particles to carry the vibration.