Discuss heat (thermal energy) transfer in terms of molecule motion.

Ask the students to briefly (copper metal heats up very fast) touch the end that was in the water.

Students may also explore and feel the end of the rod that was not in the water, and the centre of the rod, and notice differences along the rod.

They may also notice that after a short while, the whole rod will cool down again.

Discuss what is happening in terms of heat: The molecules of water moved around faster as they were heated up.

Video of molecule movement in a liquid as it is heated:.) These faster moving water molecules transfer energy to the metal rod where they are touching.

The energy from the hot water makes the molecules of the metal rod move faster, which we can feel as the rod heating up.

The heat spreads up the rod as the faster molecules at the end of the rod bump into adjacent molecules and give them energy too - so the middle of the rod (even though it was not touching the water) got warmer as well.

Eventually the molecules lose their heat energy to the air and the rod cools down again.

The movement of heat when molecules transfer energy between each other by colliding with each other is called conduction.

Radiation Transfer of heat from occurs from the constant motion of hot molecules rising and cold molecules falling.

What type of heat transfer happens when heat is transferred from a steam iron to your clothes What type of heat transfer happens when the sun heats up the sand on a beach Transfer of heat from occurs without direct contact.

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Heat Transfer In Metal Rod