Conduction, Convection, Radiation
An example of conduction is when you iron. A shirt is placed on an ironing board to be ironed. Heat from the iron is conducted to the shirt, making it easy to iron out all those unsightly wrinkles and make the shirt look sharp.
An example of convection is a heater. Hot air rises when the heater is turned on and pushes the cold air down so that the heater can heat the particles in the cold air, and when the hot air becomes cold again it falls back down to the heater in a pattern until you turn off the heater.
An example of radiation is when the sun heats up the earths. The suns heat energy radiates little waves of heat that warms up the earth.