Hourly Forecast Detailed. 1  0am:The Santee, SC forecast for Apr 11 is 63 degrees and Clear. There is 74 percentage chance of rain and 4 mph winds from the South-Southeast. 2  3am:The Santee, SC forecast for Apr 11 is 55 degrees and Clear. There is 79 percentage chance of rain and 4 mph winds from the South.
Most Important Organism? Marine plants produce between 70 and 80 percent of the oxygen in the atmosphere.
What fraction of air is oxygen percentage nitrogen in the what oxygen? The main elements human body about made up Abundance earth's atmosphere. Standard dry air, which is mainly composed of three gases nitrogen (about 78. Abundance of nitrogen in earth's atmosphere. 233 o224 apr 2017 together, nitrogen and oxygen make up 99. Oxygen, nitrogen, argon, carbon dioxide and other components. Oxygen makes up about 21.