Earth Science
Biology is the branch of science that is the study of living things.
geology
Is it exobiology
meteorology
No. Biology is the science that deals primarily with living things.
geography, topography
The branch of science that deals with water is called hydrology. This covers the study of quality, distribution and movement of water on Earth and other planets.
Science has a lot of branches including math, chemistry, biology, etc. Earth science is the study of the plates of the planet, or sometimes even other planets and their components. It is a branch of Science which deals with the Earth's components and its natures
it is excatly not the branch of earth science, but lots of concept used in earth science are of physics.
It would be called xenobiology if any such life forms existed (and they may, but).
Earth Science