Synonyms of 'Regions of the atmosphere'
ionospherea region of the earth's atmosphere, extending from about 60 kilometres to 1000 km above the earth's surface, in which there is a high concentration of free electrons formed as a result of ionizing radiation entering the atmosphere from space mesospherethe atmospheric layer lying between the stratosphere and the thermosphere, characterized by a rapid decrease in temperature with height ozone layer or ozonospherethe region of the stratosphere with the highest concentration of ozone molecules, which by absorbing high-energy solar ultraviolet radiation protects organisms on earth stratospherethe atmospheric layer lying between the troposphere and the mesosphere, in which temperature generally increases with height thermospherean atmospheric layer lying between the mesosphere and the exosphere, reaching an altitude of about 400 kilometres where the temperature is over 1000°C tropospherethe lowest atmospheric layer, about 18 kilometres (11 miles) thick at the equator to about 6 km (4 miles) at the Poles, in which air temperature decreases normally with height at about 6.5°C per km ▷ See atmosphere
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Word List of Regions of the atmosphere from the Collins English Word Lists