Download File - Curriculum for Excellence Science

Instructions
For each mini investigation:
– Read the instructions and predict the results (2 min)
– Carry out the investigation (5 min)
– Record and explain your results (3 min)
Tidy everything for next group
Coloured ice cube and warm water
Coloured ice cube
Warm/Hot Water
Coloured ice cube and warm water
Explanation:
As the ice cube melts the water sinks to the
bottom of the beaker because it is colder than the
other water. Because the ice cube is coloured we can
see the movement taking place.
What type of energy transfer is this?
Ice cube and boiling water
Explanation:
Hot liquids rise; because the water is heated at the
top of the test tube none of the heat travels down to
the ice cube so it doesn’t melt.
What type of energy transfer is this?
Comparing Heaters
Comparing Heaters
Explanation:
Only the test tubes with the heaters at the bottom
cause a large rise in temperature. Because hot gases and
liquids rise the test tubes with the heaters at the top do
not transfer heat throughout the test tube.
What type of heat transfer is this?
Smoke Box
The heated
air rises
through
thearound
‘chimney’
Firstly
the candle
heats
the air
it
above it
heated air
Cool air comes in through the other chimney to
take the place of the heated air
This air is heated when it reaches the candle
Now we have a flow of air, in through one
chimney, out through the other
Normally this convection current can’t be seen
However, if a piece of smoking paper is used,
the movement of the smoke shows us how the
air is flowing
Smoke Box
Explanation:
Smoke is sucked into the smoke box due to the
convection current produce by the burning candle.
What type of heat transfer is this?
What happens
when the particles
reach the top?
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