geoligist
Entomologists
Mycologists.
It depends on what kind of scientist it is. For example, botanists study plants.
its a zooligist would study animals :)
Meteorologists for one.
archeologist
lava volcano#
A geomorphologist.
physics
i think it was a bioligist
chemical change
Scientists have studied changes in the brain associated with depressive disorders. These treatment plans should be revised if there is no improvement of symptoms.