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2. the study of the Earth, its physical features, and how people interact with their environment.
3. an expert in or student of geology.
5. Geotechnical engineering studies the behavior of earth materials like soil and rock for construction and civil engineering projects.
6. - taking or based on the earth as the center of perspective and valuation.
9. an expert in or student of the branch of science concerning the chemical composition of the earth and its rocks and minerals.
10. the branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogues.
11. the study of groundwater and its physical and chemical interactions with the physical environment.
13. the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
15. relating to the study of the earth's physical structure and substance.

1. relating to the physics of the earth.
3. Geothermal energy comes from the Earth's internal heat and can be used for heating, cooling, or electricity generation.
4. based on or derived from the physical features of an area.
5. the branch of geology concerned with the magnetic properties of the earth.
7. the study of the chemical composition of the earth and its rocks and minerals.
8. a science that deals with the character, source, and mode of occurrence of underground water. geohydrologic.
11. an expert in the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these.
12. relating to politics, especially international relations, as influenced by geographical factors.
14. relating to geometry, or according to its methods.