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IB ESS HL 6.1.1 Atmosphere Boundary Questions

Practise IB ESS HL 006.001.001 by applying atmosphere boundary concepts to environmental systems questions.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • identify the tropospheric gas-composition chart and the gases represented by its labels
  • use the relative composition shown in the chart to distinguish the major atmospheric gases
  • apply the chart evidence to identify atmospheric composition accurately in the stated tropospheric context

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Study 6.1.1—Atmosphere boundary conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 6.1.1 Atmosphere Boundary Questions 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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