Description

Topic 3.2: Origins of Biodiversity

Master Topic 3.2 of the updated IB Environmental Systems and Societies (ESS) course with this comprehensive student workbook, fully aligned to the syllabus for first examinations in 2026. This workbook connects directly to the IB ESS videos on the IB ESSentials YouTube channel and additional resources on the Topic 3.2 page at MrKremerScience.com.

This workbook helps students understand how Earth’s biodiversity originated and diversified through geological processes including plate tectonics, isolation events, and mass extinctions. Through guided notes, structured practice activities, and a complete answer key, students explore biogeographical patterns, island biogeography, endemic species, and how geological history shaped current biodiversity distribution. Designed for both Standard Level (SL) and Higher Level (HL) students, it provides a clear pathway through the most important concepts and terminology in Topic 3.2.

Whether used in the classroom, for homework, revision, independent study, or exam preparation, this workbook encourages active learning and helps students develop the analytical skills required for success in IB ESS.

What You’ll Learn

Topic 3.2: Origins of Biodiversity

Students explore:

• How plate tectonics moved continents and separated populations
• The role of isolation in promoting speciation
• Continental drift and its impact on species distribution
• Mass extinction events in Earth’s history
• How geographical barriers isolate populations
• Island biogeography patterns and species distribution
• Endemic species and their unique evolutionary histories
• How geological history shaped current biodiversity
• Dispersal routes that connected populations across oceans
• Refugia and how they preserved biodiversity through climate change

What’s Included

✔ Coverage of all Topic 3.2 syllabus statements for SL and HL

✔ Content aligned to the updated IB ESS syllabus (first examinations 2026)

✔ Key vocabulary tables with space for definitions

✔ Guided notes that mirror IB assessment language and command terms

✔ Structured practice activities including biogeographical analysis and mapping

✔ Exam-style short-answer and extended-response questions

✔ Critical-thinking opportunities aligned with Assessment Objectives AO1 and AO2

✔ Complete answer key included

Why Students Love This Workbook

Unlike traditional revision notes, this workbook reveals how Earth’s biodiversity tells a story written in continents, islands, and geological time. By exploring plate tectonics and mass extinctions, students understand why current species are distributed as they are. Students build confidence while developing the skills to analyze, explain, and evaluate biogeographical patterns and evolutionary history.

Students can use the workbook throughout the course or as a focused revision tool before assessments.

Ideal For

• IB Environmental Systems and Societies students
• Standard Level (SL) students
• Higher Level (HL) students
• IB teachers seeking ready-to-use classroom resources
• Homeschool learners following the IB curriculum
• Students preparing for quizzes, tests, and final examinations

Product Details

Format: Digital PDF Download

Course: IB Environmental Systems and Societies (ESS)

Subtopic: Topic 3.2 – Origins of Biodiversity

Level: SL and HL

Answer Key: Included

Author: Bradley M Kremer

Publisher: IB ESSentials

Syllabus Alignment: First Examinations 2026

Important Information

This resource is independently produced and is not endorsed by or affiliated with the International Baccalaureate Organization (IBO).

Your purchase includes a license for individual educational use unless otherwise specified.

Explore additional IB ESS workbooks, revision resources, study guides, and teaching materials at ibessentials.org. (Coming soon!)