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Conduction occurs in mainly solids.
Houses lose alot of heat through their windows even
when they're shut. Heat flows from the warm inside face
of the window to the cold outside face mostly by
In a solid, the particles are held tightly together. So
when one particle vibrates, it bumps into other particles
nearby and quickly passes the vibrations on.
Particles which vibrate faster than others pass on their
extra kinetic energy (that's movement energy) to
neighbouring particles. These particles then vibrate faster
This process continues throughout the solid and gradually
the extra kinetic energy (or heat) is spread all the way
through a solid. This causes a rise in temperature at the…read more

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Slide 4

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Metals are really good conductors of heat ­ that's why they're used
for sauce pans.
Non-metals are good for insulating things ­ e.g. For saucepan
· Liquids and gases conduct heat more slowly than solids ­ the
particles aren't held so tightly together. So air is a good insulator.…read more

Slide 5

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When you heat up a liquid or gas, the particles move faster, and the
fluid (liquid or gas) expands, becoming less dense.
· The warmer, less dense fluid rises above its colder, denser
surroundings, like a hot air balloon does.
· As the warm fluid rises, cooler fluid takes its place. As this process
continues, you actually end up with a circulation of fluid (convection
currents). This is how immersion heaters work.…read more


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