Chao is thinking about doing a project on plate tectonics for the school science fair. Which design would best relate to how the movement in the Earth’s mantle is related to plate motion?

a pot of boiling water to which Chao will add food coloring to show the movement of the water
a flat shallow pan filled with a thick liquid heated by a hot plate with thick wooden blocks on top of the liquid
a flat shallow pan filled with small metal beads topped by an assembled puzzle that is shaken from side to side
a flat shallow pan filled with a thick liquid that can be heated by a hot plate with pieces of a thin plastic sheet floating on top of the liquid