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Breathless Oceans: Impact of Climate Change on Dissolved Oxygen


As a high school or introductory undergraduate Chemistry or Environmental Sciences teacher, you can use these computer based tools to teach a practical component of environmental chemistry paper i.e. the determination of dissolved oxygen in the given sample of water.

In this lesson plan, students will be introduced to the term ‘dissolved oxygen’ and understand the correlation between increase in global temperatures and declining oxygen levels in the oceans. The students will further learn about the impact of low oxygen levels on aquatic life and food webs. Thus, the use of this lesson plan allows you to integrate the teaching of a climate science topic with a core topic in Chemistry or Environmental Sciences.

Learning Outcome

The tools in this lesson plan will enable students to:

  1. Understand the importance of dissolved oxygen in the maintenance of marine ecosystems.
  2. Enable students to critically think about the human activities responsible for depleting oxygen levels in water bodies.
  3. Understand the principle and reactions involved and the role of each reagent used in the experimental determination of dissolved oxygen.
  4. Understand how the increase in global temperatures also enhances the salinity of the ocean and thus impacts the levels of oxygen there.

Teacher-contributed lesson plan by Dr. Shefali Shukla (Department of Chemistry, Sri Venkateswara College, University of Delhi, New Delhi), and Dr. Shikha Gulati (Department of Chemistry, Sri Venkateswara College, University of Delhi)

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Mapped Sustainable Development Goal(s),apart from 4 and 13


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