Conduction is the movement of heat or electricity through a medium or passage.
Some examples of conduction are:Feeling heat travel up a metal rod over a fire.Being burned by touching the stove.And cooking something on a hot pan
Convection is the circular motion of heat. As the hot air rises, it cools down, becoming cold air. The cold air heats up as it gets closer to the ground, the hot air then rises, and the circle continues.
Some examples of Convection are:The convection that occurs in the Earth's mantle that makes tectonic plates moveWhen water boils, the ht water rises, bubbling, then cools and returns to the bottom, only to heat up and rise again
Radiation is is the emission of electromagnetic waves from all matter that has a temperature greater than absolute zero, especially from a heated object, such as a radiator
Some examples include:The heat from a campfireA radiator heating a roomAnd the Sun, heating the Earth