Volcanologist specialize in the study of Volcanos.
Seismologists specialize in the study of siesmic waves .
Birth rates: moderate
Death rates: low
population growth: high
Answer: Gaseous Hydrogen Layer
Explanation:
The reason the deepest layer that this probe was able to directly sample is just the gaseous hydrogen layer is because Jupiter's upper atmosphere is about 88–92% hydrogen and 8–12% helium by percent volume of gas molecules. So the 200km this problem was able to cover is still composed of gaseous hydrogen.
