IB ESS Topic 6 Student Workbook: Atmosphere and Climate Change (SL/HL, 2026) | PDF with Answer Key

Description

Master Topic 6 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 helps students build a strong understanding of the atmosphere and climate change, from the structure and energy balance of the atmospheric system to the anthropogenic drivers of global warming, the strategies societies use to respond to climate change, and the history and science of stratospheric ozone depletion. Through guided notes, structured practice activities, exam-style questions, and a complete answer key, students develop the knowledge and skills needed to succeed in IB ESS. Designed for both Standard Level (SL) and Higher Level (HL) students, it provides a clear pathway through the most important concepts, terminology, and assessment objectives in Topic 6.

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

What You’ll Learn

Topic 6.1: Introduction to the Atmosphere

Students explore:

• The atmosphere as the outer limit of the biosphere and the system that supports life on Earth
• How differential heating of the atmosphere drives the tricellular model of atmospheric circulation, redistributing heat from the equator toward the poles through Hadley, Ferrel, and polar cells
• Greenhouse gases (GHGs) and aerosols, including water vapor, carbon dioxide, methane, nitrous oxides, and black carbon, and how they absorb and re-emit infrared radiation
• The natural greenhouse effect and how it maintains Earth’s surface temperature within a range suitable for life
• The distinction between the natural greenhouse effect, the enhanced greenhouse effect, and climate change as a broader set of changes to the planet
• The atmosphere as a dynamic system shaped by continuous physical and chemical processes, including ozone production from oxygen (HL)
• The layered structure of the atmosphere and the processes occurring in the troposphere and stratosphere (HL)

Topic 6.2: Climate Change — Causes and Impacts

Students investigate:

• The anthropogenic sources of greenhouse gas emissions, including fossil fuel combustion, deforestation, agriculture, and industrial processes
• The evidence for anthropogenic climate change, including rising atmospheric CO2 concentrations, increasing mean global temperatures, and changes to precipitation patterns
• The impacts of climate change on ecosystems at local, regional, and global scales, including shifts in biome boundaries, coral bleaching, sea-level rise, and changes to ocean circulation such as disruption of the Atlantic Meridional Overturning Circulation (AMOC)
• The socio-economic consequences of climate change, including threats to food security, human health, infrastructure, and the resilience of societies
• Positive feedback mechanisms that amplify warming, including polar albedo reduction, permafrost methane release, and increased atmospheric water vapor
• Negative feedback mechanisms that moderate warming, including increased infrared radiation emitted by a warmer Earth and enhanced carbon uptake by plants and oceans
• How systems diagrams and models can represent the cause and effect of climate change, including changes to the global energy balance
• Evidence that Earth has already crossed the planetary boundary for climate change
• How personal, cultural, economic, and political perspectives shape individual and societal responses to climate change
• Proxy data sources such as ice cores, dendrochronology, and pollen records, and how they contribute to long-term climate datasets (HL)
• Global climate models, hindcasting, and the range of uncertainty in predicting future climate outcomes (HL)
• IPCC emissions scenarios and the concept of critical thresholds approaching a new climatic equilibrium (HL)

Topic 6.3: Climate Change — Mitigation and Adaptation

Students examine:

• Why avoiding catastrophic climate change requires global cooperation rather than unilateral national action, and the role of state sovereignty in complicating international agreements
• Decarbonization of the economy, including the concept of carbon neutrality and the varied timelines different nations have set for achieving it
• Three categories of mitigation strategy: reducing the rate of global warming through geoengineering and household changes; reducing GHG production through energy efficiency, renewable energy, carbon taxes, and dietary change; and removing CO2 from the atmosphere through carbon sinks, afforestation, rewilding, and carbon capture and storage (CCS)
• Two categories of adaptation strategy: structural adaptations such as flood defenses, desalination plants, and movable infrastructure; and non-structural changes such as drought-resistant crops, vaccination programs, and land zoning
• National Adaptation Programmes of Action (NAPAs) and the role of the UN Development Programme in supporting developing countries
• The role of the UNFCCC, the IPCC, and the Conference of the Parties (COP) in developing global strategies for climate action
• The IPCC emissions scenarios and the range of possible futures depending on the speed and scale of emissions reductions
• The concept of the tragedy of the commons as applied to climate change and the atmosphere as a shared global resource
• Economic, legislative, and industry-led responses to climate change, including carbon pricing, emissions trading schemes, and B Corp branding (HL)
• The challenges and barriers to implementing effective climate management and intervention strategies (HL)
• Technology as a tool for climate mitigation, including examples of implementation in named societies (HL)

Topic 6.4: Stratospheric Ozone

Students examine:

• The electromagnetic spectrum and the distinction between UVA, UVB, and UVC radiation in terms of wavelength, frequency, and energy
• The role of stratospheric ozone in absorbing UVC and most UVB radiation and protecting living organisms from its harmful effects
• The biological and health impacts of increased UVB radiation, including DNA mutation, increased cancer rates, reduced photosynthesis in phytoplankton, and crop yield losses
• The natural steady-state equilibrium of ozone formation and destruction in the stratosphere
• How ozone-depleting substances (ODSs) including CFCs disrupt this equilibrium by breaking down ozone molecules
• The Montreal Protocol as the most successful example of international environmental cooperation, and the evidence for its effectiveness in slowing ozone depletion
• How actions under the Montreal Protocol have prevented the planetary boundary for stratospheric ozone depletion from being crossed
• The development of hydrofluorocarbons (HFCs) as CFC replacements and the subsequent discovery that HFCs are potent greenhouse gases, leading to the Kigali Amendment
• The energy intensity of air conditioning and its links to both GHG emissions and ODSs, and alternatives including improved building design and urban greening
• The chemistry of ODS breakdown in the stratosphere and the catalytic role of halogen radicals in ozone destruction (HL)
• The unique conditions that drive seasonal polar stratospheric ozone depletion, including polar stratospheric clouds and volcanic aerosols (HL)

What’s Included

✔ Coverage of all Topic 6 syllabus statements for SL and HL

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

✔ Separate sections for SL and HL content

✔ Key vocabulary tables with space for definitions and named examples

✔ Guided notes that mirror IB assessment language and command terms

✔ Structured practice activities including systems diagram construction and data analysis

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

✔ Critical-thinking opportunities aligned with Assessment Objectives AO2 and AO3

✔ Complete answer key included

Why Students Love This Workbook

Unlike traditional revision notes, this workbook actively engages students in the learning process. The guided activities are designed around the language and command terms used in IB assessments, helping learners build confidence while developing the skills required to analyze, explain, compare, evaluate, and justify environmental concepts.

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)

Topic: Topic 6 – Atmosphere and Climate Change

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.