The oxygen concentration is higher in surface waters due to the mixing of air and water, and the presence of plants/seaweeds producing oxygen through photosynthesis.
A concentração de oxigênio é maior nas águas superficiais devido à mistura de ar e água, e à presença de plantas/algas que produzem oxigênio por fotossíntese.
| Front | The concentration of oxygen is higher in the surface waters than it is in the water close to the seabed. Suggest why. (2 marks) |
|---|---|
| Back | Mixing of air and water (at surface); Air has higher concentration of oxygen than water; Diffusion into water; Plants / seaweeds near surface / in light; Produce oxygen by photosynthesis; |
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