Question 121
Observing convection. Work in groups of two or three. You need a large glass beaker, tripod without gauze, cold water, heat source such as a candle, coloured ink or water-based paint, and pipette.
Fill the beaker about three-quarters full of cold water. Use the pipette to place a small volume of ink at one side of the bottom, taking care not to mix it with the water. Place the heat source below the ink as shown. Do not stir while heating. Observe the coloured ink.
Carry out the method to observe a convection current in water.
Fill the beaker about three-quarters full of cold water. Use the pipette to place a small volume of ink at one side of the bottom, taking care not to mix it with the water. Place the heat source below the ink as shown. Do not stir while heating. Observe the coloured ink.
Carry out the method to observe a convection current in water.
