| Internal temperature differences would not have been great enough to roil its liquid outer core and drive the magnetic dynamo. |
| The simplest explanation is that convection in the outer core ceases, allowing the magnetic field to decay. |
| As long as there is sufficient fluid motion in the outer core, the process will continue. |
| Primary waves are slowed and deflected but not stopped by the liquid outer core. |
| The scientists found that the seismograms were almost identical for waves that had travelled only in the mantle, or Earth's crust, and outer core. |
| Other light elements that are commonly proposed for the outer core are silicon, carbon, helium, and nitrogen. |
