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IB ESS 2.3.10 Ocean acidification

IB ESS 2.3.10 Ocean acidification
IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026

Practise linking dissolved carbon dioxide to ocean acidification and explaining impacts on shells, coral skeletons and marine food webs.

How this is tested

  • explain how dissolved carbon dioxide lowers ocean pH
  • link reduced pH to weaker calcium carbonate shells or coral skeletons
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