1. Conduction: This is the transfer of heat through direct contact between two objects of different temperatures. For example, a metal spoon in a hot cup of tea will heat up because the heat energy from the tea is transferred to the spoon's molecules through direct contact.
2. Convection: This is the transfer of heat through the movement of fluids (liquids or gases). For example, a fan blowing across your skin cools you down by moving the warmer air away from your body and replacing it with cooler air.
3. Radiation: This is the transfer of heat through electromagnetic waves. For example, the sun's energy reaches Earth through radiation.
4. Evaporation: This is the process of a liquid turning into a gas. When liquid evaporates, it absorbs heat from its surroundings, causing cooling. For example, sweating cools you down because the evaporation of sweat takes heat away from your skin.
These four mechanisms are not mutually exclusive, and often work together in real-world scenarios. For example, a refrigerator uses both conduction and convection to cool your food.
