Temperature - GCSE Physics Definition

Temperature is a measure of how hot or cold something is. It tells us about the energy of the particles in an object or substance; when the temperature rises, the particles move faster, and when it falls, they move slower. Temperature is measured using a thermometer and is usually given in degrees Celsius (°C) in the UK. Understanding temperature is important in physics because it helps us explain everyday phenomena like why ice melts, why we feel warm in the sun, and how heat transfers from one object to another. It is a key part of studying how energy works in the world around us.