* Earth's Core is Not a Single Temperature: The Earth's core is not a uniform temperature. The inner core is incredibly hot, estimated to be around 5,200 °C (9,392 °F), while the outer core is slightly cooler.

* Kelvin is an Absolute Temperature Scale: Kelvin starts at absolute zero (-273.15 °C or -459.67 °F), the point at which all molecular motion stops. Therefore, Kelvin temperatures are always positive.

So, there's no single Kelvin temperature at the bottom of the Earth.

Instead, we can talk about the range of Kelvin temperatures found in the Earth's core:

* Inner core: Roughly 5,473 K (9,831 °F)

* Outer core: Around 4,500 K (7,670 °F)

Let me know if you have other questions about Earth's core or temperature scales!