Summary:
- 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?