A seismologist.
geologist
The name for this type of scientist is a teuthologist
The type of scientist who studies the solid and liquid components of gases that constitute the Earth is called a geoscientist or Earth scientist. This field encompasses various specializations, including geology, mineralogy, and hydrology, focusing on the Earth's materials, processes, and their interactions. Geoscientists analyze the Earth's structure, composition, and dynamics to understand natural phenomena and inform resource management.
A scientist who studies animal life is a zoologist. There is no particular name for a scientist that specialises in platypuses.
The type of scientist that studies the environment is an enviromentologist.
what scientist studies hydrogen and oxygen
Geologists study the Earth's interior. They also study the Earth's composition and all the processes that cause it to change.
A botanist.
An Entomologist
paleontologist
Sedimentologist.
A zoologist.