let's take a look at the definitions and see wich best maches with what she is looking for.
geology: the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
zoology: the scientific study of the behavior, structure, physiology, classification, and distribution of animals.
botany: the scientific study of plants, including their physiology, structure, genetics, ecology, distribution, classification, and economic importance.
meteorology: the branch of science concerned with the processes and phenomena of the atmosphere, especially as a means of forecasting the weather. *the climate and weather of a region.
hopes this leeds you in the correct direction.