• Mantle rock is mostly peridotite, which is rich in iron and magnesium.
  • The lower mantle is heated directly by conduction from the core.
  • In conduction, heat is transferred as atoms collide.
  • The rising and sinking of warm and cooler material is called convection.
  • Conduction brings hot material up toward the surface.
  • It brings cooler material down toward the core, and so on.
  • Use this resource to answer the questions that follow.
  • How deep did the drilling go in 2016?
  • How deep do they hope to get?
  • What do scientists hope to find?
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