Compared to typical river water, marine (sea) water contains an oxygen content that is_________________?
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Answer: B. 20% less
Explanation
Marine water contains high concentrations of dissolved salts and minerals that reduce gas solubility. Physical chemistry principles dictate that higher salinity levels decrease the saturation capacity for dissolved oxygen. Comparative environmental data shows marine water typically holds approximately twenty percent less dissolved oxygen than freshwater. Dissolved oxygen is essential for aquatic life survival in both river and ocean ecosystems. Salinity refers to the total dissolved salts present in water bodies. Temperature and pressure also significantly influence gas solubility levels in natural aquatic environments.
Environmental engineers monitor dissolved oxygen levels to assess pollution and ecological health in water bodies. Marine biology research accounts for lower oxygen saturation when studying ocean life adaptations. Wastewater discharge into rivers versus estuaries requires different oxygen depletion management strategies. Option A underestimates the percentage difference in oxygen content between marine and river water. Option C incorrectly claims marine water holds more oxygen despite its high salt concentration. Option D suggests an increase in oxygen which contradicts the solubility-reducing effect of salinity.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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