Primary waves are slowed and deflected but not stopped by the liquid outer core. |
Other light elements that are commonly proposed for the outer core are silicon, carbon, helium, and nitrogen. |
There is also a lot of evidence regarding how the outer core of the Earth convects and that helps to establish the temperature. |
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. |
That way has an outer core of Hourcade's outward-looking philosophy mingled with tear-jerking national pride. |
It is probable that every naturally occurring element is present in the outer core at least at trace levels. |