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Taniyah Mcbride
Physics
24 November, 10:48
Does earth's atmospheric pressure cause gravity?
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Ada Solis
24 November, 10:53
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The Earth's atmosphere is kept close to Earth by gravity. Just as the Earth's gravity keeps you firmly on the ground, it also acts on the gases of the Earth's atmosphere, holding it in place and allowing us to breathe.
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Giuliana Salazar
24 November, 10:59
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An 'atmosphere (from Greek τμός (atmos), meaning "vapour", and σφα ρα (sphaira), meaning "sphere" [1][2]) is a layer of gases surrounding a planet or other material body of sufficient mass [3] that is held in place by the gravity of the body. An atmosphere is more likely to be retained if the gravity is high and the atmosphere's temperature is low.
The atmosphere of Earth is mostly composed of nitrogen. It also contains oxygen used by most organisms for respiration and carbon dioxide used by plants, algae and cyanobacteria for photosynthesis. It protects living organisms from genetic damage by solar ultraviolet radiation, solar wind and cosmic rays. Its current composition is the product of billions of years of biochemical modification of the paleoatmosphere by living organisms.
The term stellar atmosphere describes the outer region of a star, and typically includes the portion starting from the opaque photosphere outwards. Stars with sufficiently low temperatures may form compound molecules in their outer atmosphere.
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