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Sciences

IB Environmental Systems and Societies SL and HL

28 lessons at SL. 42 at HL, with every HL-only topic. Five-minute lessons, exam-style questions and timed mock papers.

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Units
8
SL lessons
28
HL lessons
42
Questions
223
Key terms
179
Formulas
20

What you will study

Every lesson follows the current IB guide. Lessons marked HL are in the HL course only. The first unit is free.

Topic 1 · Foundation3 SL · 4 HL lessons · free
  1. 1.1Perspectives
  2. 1.2Systems and models
  3. 1.3Sustainability
  4. 1.3Ethics, economics and lawHL
Topic 2 · Ecology5 SL · 8 HL lessons
  1. 2.1Populations and communities
  2. 2.2Energy and biomass
  3. 2.3Biogeochemical cycles
  4. 2.4Climate and biomes
  5. 2.5Zonation and succession
  6. 2.1Population strategiesHL
  7. 2.2ProductivityHL
  8. 2.3–2.5Cycles and biomes under pressureHL
Topic 3 · Biodiversity and conservation3 SL · 5 HL lessons
  1. 3.1Biodiversity and evolution
  2. 3.2Human impact on biodiversity
  3. 3.3Conservation
  4. 3.1–3.2Extinction in depthHL
  5. 3.3Designing protected areasHL
Topic 4 · Water4 SL · 6 HL lessons
  1. 4.1Water systems
  2. 4.2Water access and security
  3. 4.3Aquatic food production
  4. 4.4Water pollution
  5. 4.3Maximum sustainable yieldHL
  6. 4.4Measuring water qualityHL
Topic 5 · Land3 SL · 4 HL lessons
  1. 5.1Soil systems
  2. 5.1Soil degradation and conservation
  3. 5.2Agriculture and food
  4. 5.2Food security in depthHL
Topic 6 · Atmosphere and climate change4 SL · 6 HL lessons
  1. 6.1The atmosphere
  2. 6.2Climate change: causes and impacts
  3. 6.3Mitigation and adaptation
  4. 6.4Stratospheric ozone
  5. 6.2–6.3Climate systems in depthHL
  6. 6.4Ozone chemistry and policyHL
Topic 7 · Natural resources3 SL · 4 HL lessons
  1. 7.1Resource use and management
  2. 7.2Energy sources
  3. 7.3Solid waste
  4. 7.1–7.3The energy transitionHL
Topic 8 · Human populations and urban systems3 SL · 5 HL lessons
  1. 8.1Human populations
  2. 8.2Urban systems
  3. 8.3Urban air pollution
  4. 8.1Population models and policyHL
  5. 8.3Acid depositionHL

Try a question

From “Perspectives”.

Questions are in English, like the exam. Every answer comes with an explanation.

In the systems view of an EVS, which of these is an input?

  1. AChoosing to cycle to school
  2. BVoting for a green party
  3. CBuying second-hand clothes
  4. DMedia coverage of a flood
Show the answer

D. Media coverage of a flood

Media, education and culture feed into the EVS; decisions and actions come out of it.

Start ESS today.

The first unit is free. No card needed.

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