Changing Composition of Earth’s Atmosphere

•       QUESTION 1: •       DISCUSS THE CHANGING COMPOSITION OF EARTH’S ATMOSPHERE THROUGH 4.6 BILLION YEARS OF HISTORY. •       QUESTION 2: •       DISCUSS THE ORIGIN, CONCENTRATION AND IMPORTANCE OF MOLECULAR OXYGEN IN EARTH’S ATMOSPHERE. •       QUESTION 3: •       DISCUSS THE IMPORTANCE OF AND THREAT TO EARTH’S OZONE LAYER •       QUESTION 4: •       DISCUSS THE COMPOSITION OF AS WELL AS THE POSITIVE AND NEGATIVE ASPECTS OF GREENHOUSE GASES AND “THE GREENHOUSE EFFECT”. •       QUESTION 5: •       DISCUSS THE STRUCTURE (LAYERS) OF EARTH’S ATMOSPHERE.     TEXT  Earth Science – Portrait of a Planet by Stephen Marshak, 6TH EDITION Published by W. W. Norton & Company, 2019.

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