Geophysics is a branch of Science concerned with the physical processes and physical properties of the Earth, and their application in locating natural resources. Geophysical techniques apply the concepts of physics to study the planet.
Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems. The chemical analysis of minerals gives information about their origin and transformation.
Hydrology is a subject which deals with the movement, distribution and management of water on Earth and other planets, including the hydrological cycle, resources and environmental watershed sustainability.