Conduction: When a solid is being heated, the heat causes the solid particles to collide against each other and vibrate more vigorously. The particles closest to the heat will expand start vibrating and will hit the particles in the row above them. This will cause them to vibrate and pass the collision along to a different row.
Convection: Only takes place in fluids, gases and SOME solids such as sand. When water is heated the molecules heat up and start to rise as the warmer portions of the water are less dense and therefore, they rise. However, the particles soon sink as the cooler portions of the water are less dense.
Radiation:
- Objects absorb infrared radiation from the objects that surround them, and emit them.
- Hotter objects give out infrared radiation faster than they absorb the infrared radiation from the colder objects around them.
- Contrarily, colder objects will absorb infrared radiation faster than giving it out.
