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IB ESS HL 6.4.6 Ozone Depleting Substances Odss Questions

Practise IB ESS HL 006.004.006 by applying ozone-depleting substances (odss) concepts to environmental systems questions.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • identify sources and chemical examples of ozone-depleting substances
  • explain how ODSs and human activities disrupt stratospheric-ozone equilibrium
  • distinguish ozone-depletion causes from global-warming causes and evaluate policy effects such as the Montreal Protocol

IB ESS HL 6.4.6 Ozone Depleting Substances Odss Questions question 1

[Maximum number: 1]
Figure 2: Observed and projected changes in global stratospheric ozone

Figure:Observed and projected changes in global stratospheric ozone

Key:
- Annually averaged data
- Average of atmospheric model projections

State one chemical responsible for the trend in the recorded annually averaged data between 1980 and 1990 shown in Figure 2.

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