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IMSO 2017 Science International - Theory I Question 22

IMSO Science · IMSO 2017 Science International - Theory I

Question 22

Which of the following methods would not produce convection currents in a container filled with water at 30°C?
  1. Float a piece of ice on the water.
  2. Light a candle beneath the container.
  3. Drop a piece of hot metal into the water.
  4. Place a light bulb near the water surface.