Creek Connections got me interested in Dissolved Oxygen. Dissolved Oxygen is microscopic oxygen molecules that are mixed in the water, it is found in air space between water molecules. The reason I ask this is because when running creek water hits rocks it is exposed the air. The oxygen is mixed into the water which increases the oxygen level in the water. Or human impact like eutrophication.
Eutrophication is when fertilizers spill into creeks which increases plant growth.
The plants will soon die, aerobic bacteria will decompose them, that will take oxygen from the stream. My hypothesis is that there is more oxygen in running creek water than there is in pooled creek water. The materials I used to conduct my analysis was the Hach Kit. Inside the Hach Kit was Dissolved Oxygen Reagents, test tubes, and Sodium Thiosulfate Standard Solution. Before my experiments, I rinsed the the test tubes and Dissolved Oxygen sample bottles with Distilled Water.