Quiz

Quiz: Threats to peatlands

5 questions · Pass at 70% · +30 pts on first pass

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Question 1 · Single choice — select one

The maps below show the paleogeographic development of the Netherlands at three different times. Which sequence shows the correct order from oldest to most recent? (single choice)

A → B → C A → C → B B → A → C C → A → B

Question 2 · Single choice — select one

Which sequence best describes the self-reinforcing process of subsidence in Dutch peat meadow areas?

Drainage → peat growth → land rises → further drainage Drainage → peat subsidence → wetter conditions → further drainage Peat extraction → sea-level fall → peat growth → land subsidence Sea-level rise → peat oxidation → land rises → further drainage

Question 3 · Single choice — select one

Why has much of the original peat in the western Netherlands disappeared?

Both raised bog and fen peat disappeared mainly because of rising sea levels. Both raised bog and fen peat were mainly removed to construct drainage canals. Raised bog peat mainly oxidized naturally, while fen peat was extracted for horticulture. Raised bog peat was mainly extracted for fuel, while drained fen peat compacted and oxidized.

Question 4 · Single choice — select one

What is meant by “relief inversion” in the western Dutch peat landscape?

Agricultural fields were raised above rivers by adding excavated peat. Formerly low river valleys became higher through sediment deposition. Formerly high peat areas became relatively low through peat loss and subsidence. Rising sea levels caused the entire coastal landscape to tilt towards the east.

Question 5 · Single choice — select one

Why can peat subsidence create problems for buildings that have deep foundations?

The building subsides faster than the surrounding peat surface. The building remains relatively stable while the surrounding land surface subsides. The foundations increase peat oxidation directly beneath the building. The foundations prevent groundwater from flowing through the surrounding peat.