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The homosphere is the portion of the earth's atmosphere, up to an altitude of about 50 miles above sea level, in which there is continuous turbulent mixing, and hence the composition of the atmosphere is relatively constant; as opposed to the heterosphere or exosphere, the higher regions in which the composition becomes stratified.[1][2]


  1. Wile, Dr. Jay L. Exploring Creation With Physical Science. Apologia Educational Ministries, Inc. 1999, 2000
  2. Curry, Judith A. and Peter J. Webster (1999), Thermodynamics of Atmospheres and Oceans, Elsevier, ISBN 0121995704, p. 3