Thermal Conductivity - GCSE Physics Definition

Thermal conductivity is a measure of how well a material can conduct heat. It tells us how quickly heat can pass through a material. Materials with high thermal conductivity, like metals, let heat travel through them easily, making them good conductors of heat. On the other hand, materials with low thermal conductivity, like wood or plastic, do not let heat pass through easily and are known as insulators. Understanding thermal conductivity helps us choose the right materials for keeping things warm or cool, like in building insulation or cooking utensils.