Insulation Insulation in our clothing keeps us warm on cold days. Insulation installed into our homes, buildings and schools reduces how much heat they lose during the winter, making them warmer and reducing how much money we spend on gas and other fuels. Insulation in our buildings is often hidden, in the walls, in lofts and under the floor. It is a cheap way to save energy and money; making our homes and schools cheaper to keep warm.
Some materials let heat move through them easily (they conduct heat well). These materials are called thermal conductors.
Metals (for example, steel and aluminium) are good thermal conductors. We use metals to make objects that need to conduct heat well. For example metal saucepans conduct heat well so the food inside heats up quickly. Thermal Insulators
Other materials do not let heat move through them easily (they do not conduct heat well). These materials are called thermal insulators.
Plastics, wood and some fabrics are good thermal insulators.
Thermal insulators are good at keeping heat out and keeping heat in. Your winter scarf is a good example of a thermal insulator. It stops the heat from your body escaping into the cold air.
Plastic is a good example of a thermal insulator. It can be used as a handle on a saucepan - the plastic stops the heat from travelling to your hand.
Heat Heat always travels from a warmer area to a cooler one. So a hot drink left in a cold place will always lose heat to the surroundings. It will get cooler until eventually it is at the same temperature as its surroundings.
But if the drink is inside a good thermal insulator (like a thermos flask) it will lose the heat very slowly.
Thermal Imaging camera experiments The linked experiments can be completed as teacher demonstrations or as a carousel of activities in class for KS2 and KS3 pupils.