There are three main processes of heat transfer:

1. Conduction

Conduction is the transfer of heat energy through direct contact between particles. When you touch a hot stove, the heat from the stove is transferred to your hand through conduction. Conduction occurs most easily in solids, where the particles are close together.

2. Convection

Convection is the transfer of heat energy by moving fluids, such as liquids and gases. When you boil water, the hot water rises to the surface and the cooler water sinks to the bottom. This creates a current that helps to distribute the heat evenly throughout the pot. Convection also occurs in the atmosphere, creating wind and weather patterns.

3. Radiation

Radiation is the transfer of heat energy through electromagnetic waves. The sun's heat reaches Earth through radiation. Radiation can travel through a vacuum, which means it can transfer heat energy through space. This is how we feel the heat from a fire even though we are not touching it.

These three heat transfer processes are constantly at work in our everyday lives. Understanding how they work can help us to stay warm in the winter and cool in the summer.