Q1. Explain why the particles moved the way they did in this experiment?
A1. The heat supplied to the bottom o the beaker by the bunsen burner causes heat to be transferred to the water and dissolving potassium permanganate above the heating point. The water and potassium permanganate particles gain energy and spread out, which decreases their density, this means that they start to rise upwards. As they get further away from the heat source, however, they start to cool and the particles move closer together. The density increases an dthey sink again. This flow of warm water rising and cool water sinking causes the convection.
Q2. This investigation modelled heat transfer by convection. Outline the benefits of modelling concepts in science?
A2. Models are helpful in providing an insight into an effect which is very difficult to see under normal circumstances.
Q3. Are convection currents modelled accuretly in this investigation? What limitations are there to modelling concepts in science?
A3. A variety of responses are possible.
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