a type of scientist who studies about metal is called metallururgist
Ahemist is the type of scientist that studies elements, atoms, molecules .
A scientist who studies crystals is known as a Crystallographer.
A scientist who studies water (H2O) would be a hydrologist or a water chemist.
A chemist studies the behavior of substances, including their composition, structure, properties, and reactions. They seek to understand how different substances interact with each other and with their environment.
A chemist studies the composition, structure, properties, and changes of matter. They explore the elements, molecules, and compounds that make up substances and how they interact with each other.
An ecologist studies pollution
A mineralogist studies minerals.
The kind of scientist who studies Urology would be a Biologist, since Urology concerns a biological function (urination). If you mean the kind of doctor who studies Urology, that would be a Urologist.
meteoroligists
Audiologist
An Ichthyologist.
A zoologist.
Botanist
seismologist
a biologist
cosmologists
Mathmaticion