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08/14/2014
Heat and Temperature
Heat is a type of energy that will flow from a warm area
to a colder one. For example...
This cup of coffee will ____ ____
because it is _____ ____ heat
energy into the surroundings.
This drink (taken out of the
fridge) will _____ ___ because it
is _____ ___ heat energy from
the surroundings.
Words ­ giving out, warm up,
taking in, cool down…read more

Slide 3

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08/14/2014
Conduction
Conduction is all about when heat is transferred through a
_________. The heat is passed on by ___________ in the
molecules. These vibrations get BIGGER when the solid has
more ENERGY (i.e. when it is being __________).
Heating a non-metal
Heating a metal
Metals are _______ conductors than non-metals. This is
because the heat is carried by free ________ that can
carry the energy around the metal and give it to other
electrons and ions.
Words ­ vibrations, electrons, solid, heated, better…read more

Slide 4

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08/14/2014
Convection
Convection is all about when a gas or liquid
("fluid") moves and carries heat with it. When
the fluid is heated it ____________. This
means that it will become less __________
than the colder fluid around it. Because of
this the warmer fluid will try to "_______"
over the colder fluid, and this is why warm air
rises. This is called a convection
___________. This is how heat reaches us
from the ___________ in this room.
In CONDUCTION the heat was passed on
by VIBRATIONS in a SOLID
In CONVECTION the heat is passed on by
the FLUID expanding, rising and TAKING
THE HEAT with it
Words to use: expands, radiators, dense, heated, current, float…read more

Slide 5

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08/14/2014
Some questions on convection...
1) Freezers in supermarkets are often left open to the
air. Explain why the food does not melt easily.
2) Explain why a hot air balloon rises in the air.
3) Explain why an ice cube floating at the top of a drink
will cool all of the drink.…read more

Slide 6

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08/14/2014
Radiation
An introduction...
I'm cool! I'm very hot!…read more

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