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IB ESS HL 5.1.20 Hl Soil Property Analysis Questions

Practise IB ESS HL 005.001.020 by applying soil property analysis concepts to environmental systems questions.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • use a soil-texture classification graph and composition data to classify a soil such as loam
  • calculate changes in evaporation from data when vegetation cover changes
  • explain how soil texture and vegetation cover affect water retention, evaporation, runoff and soil-system functioning

Learn this topic

Study 5.1.20 (HL)—Soil property analysis conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 5.1.20 Hl Soil Property Analysis Questions question 1

[Maximum number: 1]

Clay / \%

Silt / \%

Sand / \%

70

10

20

20

40

40

Table:Composition of soil samples A and B

the soil-texture classification graph context — the soil-texture triangle classifies soils from the proportions of sand, silt and clay. Soil A is marked as clay on the soil-texture classification graph.
the soil-composition table data:
• Soil A — clay 70%; silt 10%; sand 20%.
• Soil B — clay 20%; silt 40%; sand 40%.

the soil-texture classification graph context — the soil-texture triangle classifies soils from the proportions of sand, silt and clay. Soil A is marked as clay on the soil-texture classification graph.
the soil-composition table data:
• Soil A — clay 70%; silt 10%; sand 20%.
• Soil B — clay 20%; silt 40%; sand 40%.

With reference to the soil-texture classification graph and the soil-composition table, determine the classification of Soil B.

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