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Conduction

Learning objective: explain how energy is transferred by conduction through the movement of particles.

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OBSERVE AND EXPLAIN WHAT YOU SEE

THINK – PAIR - SHARE

STARTER

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HOT, WARM OR COLD?

WHAT DOES THE DESK FEEL LIKE?

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HOT, WARM OR COLD?

WHAT DOES THE LEG FEEL LIKE?

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If a beaker full of cold water is put inside a beaker full of boiling water, what will happen to the temperature in both?

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  • The free electrons can move around and vibrate.
  • The heat energy is passed on by neighbouring particles vibrating along the metal.
  • There are too few free electrons in a non-metal for this to happen.

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Quick conduction experiments

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  1. Step up a clamp stand with four paperclips stuck onto a metal rod with vaseline.

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  • Heat one end of the rod and time how long the paperclips take to drop off.

www.abernet.org.uk

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Quick conduction experiments

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Quick conduction experiments

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What would you feel (do not try this).

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Why

In your pairs discuss which is better. Metal or wood BBQ skewers

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Why

Talk in your pairs and explain why…

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A) The handle is made from plastic

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B) The casing is made from metal.