Vocabulary #6
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.