Atmosphere: The envelope of gases surrounding the earth or another planet.
Noun. The atmosphere is a layer of gas that exists on the planet.
Biosphere: The regions of the surface, atmosphere, and hydrosphere of the earth or analogous parts of other planets occupied by living organisms.
Noun. We have to take care of the biosphere, for a better planet.
Geosphere: Any of the almost spherical concentric regions of matter that make up the earth and its atmosphere, as the lithosphere and hydrosphere.
Noun. The geosphere is a part of the planet.
Hydrosphere: All the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
Noun. It is a material found on the solid surface of the earth.
Astronomy: The branch of science which deals with celestial objects, space, and the physical universe as a whole.
Noun. Astronomy is a very nice study to learn.
Climatology: The scientific study of climate.
Noun. Climatology studies the weather.
Geology: The science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
Noun.She was studying geology.
Hydrology: The branch of science concerned with the properties of the earth's water, and especially its movement in relation to land.
Noun. Hydrology is a science.
Meteorology: the branch of science concerned with the processes and phenomena of the atmosphere, especially as a means of forecasting the weather.
Noun. An induction course to learn basic meteorology.
Oceanography: The branch of science that deals with the physical and biological properties and phenomena of the sea.
Noun. Oceanography is a field of study.
Paleontology: The branch of science concerned with fossil animals and plants.
Noun. Palentology studies many fossils of ancient remains.
Physical geography: The branch of geography dealing with natural features and processes.
Noun. Physical geography covers many topics.
Astro =star : The Greek ástron is also related to such words as asteroid and even the star itself.
Noun. An astro can be a star.
Atmos =vapor: Aseous envelop surrounding the earth.
Noun. Vapor can come out of a sauna.
Bio=life: Biology is the natural science that studies everything related to life and the organic, including processes, systems, etc.
Noun. Biology encompasses many branches.
Clima =region: Climate is the most frequent state of the atmosphere of a place on the earth's surface.
Noun. There are several types of climates.
