• 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 EDITIONPublished by W. W. Norton & Company, 2019.For more information on Changing Composition of Earth’s Atmosphere read :https://en.wikipedia.org/w/index.php?search=Changing+Composition+of+Earth%27s+Atmosphere&title=Special%3ASearch&go=Go&ns0=1
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