Free teaching materials for AQA and OCR A2 Applied Science

Estimating environmental damage in freshwater

Students learn how to sample freshwater invertebrates, and how to obtain scores for the Trent biotic index (supports OCR Unit 14 and AQA Unit 16).

This resource contains:

  • The Trent biotic index. Freshwater invertebrates are used to get scores which may be used to compare water quality at different points in a stream or river - STUDY SHEET 

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