Section 24.3 Air Resources Pages 687 to 692
Origin of Oxygen The atmosphere did not originally have oxygen as part of the atmospheric composition As early organisms used the high levels of Carbon Dioxide they produced Oxygen (photosynthesis) Over billions of years the levles of oxygen rose
Notes Links The Nitrogen Cycle The Carbon Cycle Air pollution https://www.ducksters.com/science/ecosystems/nitrogen_cycle.php The Carbon Cycle https://www.ducksters.com/science/ecosystems/carbon_cycle.php Air pollution https://www.ducksters.com/science/environment/air_pollution.php
Transport and Dilution Pollutants can be transported via wind and their final location is based on the topographical structure of the land Some pollutants can undergo reactions as they become large enough to fall to the Earth’s surface in the form of snow, mist, fog and rain
Assignment Questions Page 692 # 1 to 6