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NotesESSTopic 2.6
Unit 1 · Ecology · Topic 2.6

IB ESS — Human impact on ecosystems (to redistribute to Topics 3 & 6)

Topic 2.6 investigates how human activities disrupt ecological systems, covering pollution, habitat destruction, overexploitation, and invasive species. Students evaluate specific case studies and assess the effectiveness of strategies to reduce human impact on ecosystems.

2.6 FlashcardsExam technique guidePractice questions

What you'll learn in Topic 2.6

    Exam relevance

    ESS is assessed through Paper 1 (case study) and Paper 2 (short answer & structured questions). Concepts from this topic may appear in either paper, often combined with data analysis or real-world examples.

    Suggested study order: Read the notes for each sub-topic below → test yourself with flashcards → attempt practice questions → review exam technique.

    Study resources — 2.6 Human impact on ecosystems (to redistribute to Topics 3 & 6)

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    Topic 2.6 Human impact on ecosystems (to redistribute to Topics 3 & 6) forms a core part of Unit 1: Ecology in IB ESS. Mastering these concepts will strengthen your understanding of connected topics across the syllabus and prepare you for exam questions that require analysis, evaluation, and real-world application.

    Frequently asked questions

    What does Topic 2.6 Human impact on ecosystems (to redistribute to Topics 3 & 6) cover in IB ESS?
    Topic 2.6 covers human impact on ecosystems (to redistribute to topics 3 & 6) as part of the IB ESS syllabus. Students learn key concepts, definitions, and real-world examples that are tested in Paper 1 and Paper 2 exams.
    How should I revise Human impact on ecosystems (to redistribute to Topics 3 & 6) for IB ESS exams?
    Start by reading the micro-topic notes to understand each concept, then use flashcards to memorise key terms. Practise exam-style questions to apply your knowledge under timed conditions and review the marking criteria.
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    2.5 Zonation, succession and change in ecosystems
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    3.1 Biodiversity and evolution
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