In today’s Practical we had to investigate the movement of convection currents. My group and l had no trouble in doing this prac, we had to heat the hot plate then pour cold water in the beaker and then we had to place a crystal in the middle of the beaker and write down what happens. The crystal then started to come back up and would then spread out in all directions. The second part of the Prac was to see if we had put ice over the crystal in cold water what would happen? The crystal started to melt into the water. When we finished our Prac’s we then had to complete a work sheet on Earthquakes. The things that l learned from the prac’s was that ice can melt the crystal and make it sink to the bottom, and that crystals can spread around when heated up by the hot plate. I also learned that crystal’s contain potassium permanganate.
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