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biosphere |
Also found in: Medical, Encyclopedia, Wikipedia | 0.01 sec. |
biosphereNarrow zone that supports life on our planet. It is limited to the waters of the Earth, a fraction of its crust, and the lower regions of the atmosphere. The biosphere is made up of all the Earth's ecosystems. It is affected by external forces such as the Sun's rays, which provide energy, the gravitational effects of the Sun and Moon, and cosmic radiations. |
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