The topic you will get in the app are:
Atmosphere chemistry
Atmosphere
Atmosphere physics
Atmosphere Sciences
Biological oceanography
Chemical oceanography
Climate variation
Climatology
Earth_s energy budget _inflow and outflow
Economic geology
Edaphology
Energy in the earth
Engineering geology
Environmental chemistry
Environmental soil science
Galaxies and stars
Gemology
Geochemistry
Geochronology
Geodesy
Geographic information systems
Geographic mapping
Geography
Geology
Geomagnetic
Geomicrobiology
Geomorphology
Geophysics
Geostatistics
Glaciology
Global Positioning System
Historical geology
History of Earth science
Human geography
Hydrogeology
hydrology
Limnology
Marine geology
meteorology
Micropaleontology
Mineral physics
Mineralogy
Natural hazards
Oceanography
Oceans
Paleoceanography
Paleoclimatology
Paleontology
Paleoseismology
Palynology
Pedology
Petroleum geology
Petrology
Photogrammetry
Physical geodesy
Physical geography
Physical oceanography
Planet Earth
Planetary geology
Planetary science
Planets and satellits
Quaternary geology
Rock cycle
Satellite navigation
Sedimentology
Seismology
Solar systems
Spatial decision support systems
Structural geology
Surface processes
Tectonic evolution
Tectonic processes
Volcanology