psychologist
The study of humans behavior is known as Psychology and Sociology.
A microbiologist.
Physiologically speaking, the Anatomist studies Anatomy.
A selenographer studys maps of the moon.
Botanists are people who study plants and nature.
Geology.
a cryologist
Paleontologist-studys fossils of once living organisms Geologist-studys rocks Geochemist-studys the creation of rocks Volcanologist-studys volcanoes Entomologist-studys insects Biologist-studys living organisms Botany-study of plants Zoology-study of animals Bacteriology-study of bacteria Ecology-study of relationships among organism & their physical environments Histology-study of tissues which make up the body Mycology-study of fungi Morphology-a branch of biology that deals with the forms and structure of plants & animals Photochemistry-study of chemical changes involving light Physics-study of matter & energy
a botanist
a person who studys biographics
Astronomer
Geology.