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.
A mineralogist studies minerals.
An ecologist studies pollution
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.
Botanist
cosmologists
seismologist
a biologist
Mathmaticion
A zoologist.