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  2. Topic
    Geology/Geography/Oceanography/Atmospheric Sciences
  3. Study Set
    Earth Portrait of a Planet Study Set 2
  4. Exam
    Exam 20: An Envelope of Gas: the Earths Atmosphere and Climate
  5. Question
    The Life-Sustaining Part of the Earth System Is Known as the __________
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The Life-Sustaining Part of the Earth System Is Known as the __________

Question 10

Question 10

Multiple Choice

The life-sustaining part of the Earth System is known as the __________.


A) stratosphere
B) troposphere
C) critical zone
D) modern atmosphere

Correct Answer:

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