Two sources of dissolved oxygen are the atmosphere and plants in the water. As the sun rises and photosynthesis is occurring, the amount of oxygen in the water increases throughout the day until the sun goes down and the amount of carbon dioxide decreases. When the sun goes down, photosynthesis stops and the amount of oxygen starts to decrease again. Earlier in the day there is less oxygen that in the evening, and then there is less oxygen again when the sun goes down.
Tuesday, May 14, 2013
May 7th-Dissolved Oxygen
Two sources of dissolved oxygen are the atmosphere and plants in the water. As the sun rises and photosynthesis is occurring, the amount of oxygen in the water increases throughout the day until the sun goes down and the amount of carbon dioxide decreases. When the sun goes down, photosynthesis stops and the amount of oxygen starts to decrease again. Earlier in the day there is less oxygen that in the evening, and then there is less oxygen again when the sun goes down.
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