Which one of the following about the atmosphere is correct?

  • The atmosphere has definite upper limits but gradually thins until it becomes imperceptible
  • The atmosphere has no definite upper limits but gradually thins until it becomes imperceptible
  • The atmosphere has definite upper limits but gradually thickens until it becomes imperceptible
  • The atmosphere has no definite upper limits but gradually thickens until it becomes imperceptible

Related Question & Answers

Which one of the following about the atmosphere is correct?
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