Dissolved Oxygen

Students test water to determine the dissolved oxygen content while displaying the proper use of testing instruments while visiting water testing sites. They determine if the amount of dissolved oxygen is appropriate for the tested...

Students are shown how dissolved oxygen enters the water. They are taught the difference between a water sample that has been exposed to the air and one that has not. Students brainstorm what organisms need to survive. They use dissolved...

Learn about the factors that affect the way oxygen dissolves in salt water with a chemistry lab. After studying the molecular structure of water, young scientists figure out how aeration, temperature, and organic waste affect...

Students investigate the relationship between dissolved oxygen and organic materials and aquatic organisms. This is a 3-lesson plan series in which students explore dissolved oxygen and then design an experiment testing the effects of...

Students evaluate the relationship between biodegradable waste and dissolved oxygen in water.  In this biodegradable wastes instructional activity students complete a lab activity in groups then analyze their results.

Field study groups collect samples of stream water and identify the macroinvertebrates found. Using their data, they calculate a water quality index to rate the health of the stream. They graph their data and discuss the value of a water...

A link to a comprehensive macroinvertebrate guide gives you the information needed to prepare for this field study activity. Sample macroinvertebrates are collected from areas representing different environmental conditions. Junior...

One in every seven truckloads of perishable foods delivered to grocery stores gets thrown away. Is there anything that can be done with this waste? One solution is to recycle the old produce and turn it into fertilizer. The video, part...

In this oxygen worksheet, students analyze date about the oxygen levels in a river to determine the cause of the dying fish. This worksheet has 2 graphs, 12 short answer questions, and 2 graphic organizers.

Students explain why dissolved oxygen is important in aquatic ecosystems. They evaluate the optimal dissolved oxygen levels for living organisms.