Learning objective

Identify potentially harmful substances in water, such as toxic metal compounds, plastics that can harm aquatic life, sewage with harmful microbes, and nitrates and phosphates that can lead to water deoxygenation and damage aquatic ecosystems, without needing details on eutrophication.

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Exam focus

Cambridge IGCSE ChemistryChemistry of the environmentCore content

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Quick explanation

This point belongs to Water, especially Water outcomes.
You need to be able to identify potentially harmful substances in water, such as toxic metal compounds, plastics that can harm aquatic life, sewage with harmful microbes, and nitrates and phosphates that can lead to water deoxygenation and damage aquatic ecosystems, without needing details on eutrophication.
The key ideas to know are State.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

State

Why it matters

This objective helps connect Water outcomes to exam-style questions, flashcards, and revision notes for Water.

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Practice Questions7 linked questions

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Paper 3Theory (Core)1 marks

Description

Water bodies can be contaminated with various harmful substances that affect aquatic life.

a
State one harmful substance found in water that can affect aquatic ecosystems.
Your answer
Aim for approximately 1 distinct marking point.
[1]

Revision notestopic notes

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