IB Biology D4.3: Climate change (first exams in 2025)

This lesson can be purchased as part of the IB Complete course bundle (first exams 2025) at a heavily discounted price, formed of 40 fully resourced lessons, end of topic exams and student checklists. It can be found here

This PowerPoint contains everything you need to teach the Theme/Unit D4.3: Climate change in the new IB Biology specification.

YouTube video is a preview of the full resource (does not include all slides)

This Powerpoint consists of over 50 slides and contains the followings:

• All the information the IB have included in the new spec.
• Clear diagrams
• Student friendly content
• Summary videos
• Student research tasks
• Clearly identified HL and SL content
• Student checklist
• Summary

The following content is included:

D4.3.1: Define anthropogenic climate change and describe its causes.
D4.3.2: Outline the positive feedback cycles in global warming, with examples.
D4.3.3: Describe the transition from net carbon accumulation to net loss in boreal forests as an example of a tipping point.
D4.3.4: Explain the melting of landfast ice and sea ice as examples of polar habitat change.
D4.3.5: Explain the effects of climate change on ocean currents and nutrient distribution.
D4.3.6: Understand the effect of climate change on range shifts of temperate species and coral reefs.
D4.3.7: Evaluate afforestation, forest regeneration and restoration of peat-forming wetlands as approaches to carbon sequestration.
D4.3.8: Define phenology and outline the disruption of phenological events caused by climate change
D4.3.9: Explain how climate change can lead to increases in the number of insect life cycles.
D4.3.10: Discuss the concept of evolution as a consequence of climate change.