25. Pile-dwellings. For what primary purpose are these dwellings built on stilts?
(A) 1 = protection against melting floods 2 = protection against seasonal floods
(B) 1 = protection against melting floods 2 = protection against vermin
(C) 1 = protection against soil subsidence 2 = protection against seasonal floods
(D) 1 = protection against soil subsidence 2 = protection against vermin

21. New Caledonia counts for about 25% of the world’s nickel resources. Which image is showing a nickel mine? (A) image A (B) image B (C) image C (D) image D

22. What is critically depicted by this cartoon? (A) deindustrialization (B) gentrification (C) urban blight (D) counter-urbanisation

23. Microscope images (so called thin sections) from 4 different types of rocks. Which image is showing a metamorphic rock? (A) image A (B) image B (C) image C (D) image D

24. On which island of the Aeolian Islands has this image been taken? (A) Alicudi (B) Salina (C) Stromboli (D) Vulcano

26. What is this animated map showing? (A) one year of tweets (Twitter) stating the word iGeo (B) one day of a computer attack with ransomware (C) one month of human-induced earthquakes (D) one year of people getting infected by an influenza-virus

27. This population diagram shows the formation of a population chimney. What is depicted by the area shaded in blue (unit x)? (A) deaths due to civil war (B) deaths due to migration (C) deaths due to AIDS (D) deaths due to famine

28. What is the dominant factor in determining land use in both satellite images? (A) relief (B) soil fertility (C) micro-climate (D) politics

29. Four videos showing a religious ceremony. Which video shows a ceremony where Hindus pray for early monsoon rains? (A) video A (B) video B (C) video C (D) video D

30. Many cities in the northern hemisphere have poor east end districts. What can be considered to be a generalized reason for the concentration of poor groups always ending up in the east of these cities? (A) downstream location at major river which took city’s waste and smell eastward (B) later sunrise in the east compared to the western part of these cities (C) prevailing winds are westerlies, blowing pollution to the east (D) distribution of the urban heat island, which is eastward biased

31. What is depicted on the y-axis of this country-dot-animation? (A) Y = housing price index (1980 = 100) (B) Y = carbon emissions (CO2-equivalent tonnes per person) (C) Y = life expectancy (years) (D) Y = adult literacy rate (percentage)