Heat transfer is conducted through conduction, convection, and radiation. 1. Heat transfer: Heat is transferred from the higher temperature part of the object along the object to the lower temperature part, called conduction. In gases, the heat conduction process often occurs simultaneously with convection. 2. Thermal convection: The process of bringing the temperature between the hotter and cooler parts of the liquid or gas to a uniform temperature through the circulation. Convection is a unique form of heat transfer in liquids and gases. Convection of gases is more pronounced than liquids. 3. Thermal radiation: An object has the ability to emit energy out of fa due to its own temperature. This type of heat transfer is called thermal radiation. Although thermal radiation is also a form of heat transfer, it is different from heat conduction and convection. It can transfer heat directly from one system to another without relying on media. Thermal radiation emits energy in the form of electromagnetic radiation. The higher the temperature, the stronger the radiation.