In this investigation I will investigate heat loss and heat transfer
in different materials and I will also investigate which materials are
the best insulators. A material that prevents this heat loss is called
an insulator and this helps to keep the object that is being insulated
warmer for, longer. Heat is generally transferred in three different
Conduction is energy transferred from the hotter part of a solid to
the colder part of conduction. It is transferred by the particles in
the material the particles in the hot part are vibrating more. These
vibrations are passed on to the cooler particles next to them, so the
energy spreads through the material until all particles have the same
energy. Metals are good conductors, whereas most non-metals are poor
conductors and poor conductors are used as insulators.
Convection is the transfer of energy by the movement of a liquid or
gas. When a liquid becomes warm it expands and becomes less dense. The
warmer fluid floats above the cooler fluid, which sinks. This creates
a flow, which is called convection current.
Radiation is when bodies emit radiation. Basically the hotter the
body, the more energy it radiates. Dark, dull surfaces emit more
radiation than light, shiny surfaces. They also absorb radiation well.
Light, shiny surfaces do not absorb radiation well - they are good
Radiation can pass through space - that is how the warmth of the sun
reaches the Earth.
Also heat can be transferred by evaporation and this may be relevant
... middle of paper ...
it could have made it warmer or cooler.
The method I chose to use was successful and worked well within the
investigation it was stable and fair. I would not change the method if
I repeated the investigation as it worked well with the experiment.
Also to improve my investigation I could have done many things. I
could have repeated the experiment again and took down the average
results and this will make the experiment more accurate as one set of
my results could have been affected. Also there would have been
different temperatures within the beaker thought they would have only
been slight differences. The temperature would be different with the
water nearer to the glass compared to the water directly in the
middle. So it would have helped if I stirred the water so I could get
the general temperature.
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