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IB ESS HL 6.1.1 Atmosphere boundary Question Bank

Practise IB ESS SL/HL 006.001.001 by applying atmosphere boundary concepts to exam-style environmental systems questions.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • identify the relevant environmental system, process or evidence
  • apply the correct ESS concept and explain the causal relationship
  • evaluate the outcome using ecological, social or management evidence

6.1.1—Atmosphere boundary question 1

[Maximum number: 1]
Gas composition of the troposphere by volume

Figure:Gas composition of the troposphere by volume

the tropospheric gas-composition chart shown above below is a pie chart showing the percentages (by volume) of gases in the troposphere.

Label gases A and B on the tropospheric gas-composition chart shown above above.

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