الموصلات والعوازل الحرارية Thermal conductors and insulators

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It might be said

Heat travels quickly through thermal conductors, like metals
Thermal insulators, like plastic and wood, do not let heat travel through them easily
Temperature is measured in degrees Celsius °C

Thermal conductors

Some materials let heat move through them easily (they conduct heat well). These materials are called thermal conductors

Metals

Metals (for example steel and aluminum) 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

Temperature
Temperature is a measure of how hot or cold things are. You need a thermometer to measure temperature
Temperature is measured in degrees Celsius °C

Ice melts at exactly 0°C
A hot bath is about 40°C
Water boils at exactly 100°C

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

Try some experiments to find the best insulator

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