Quiz

Soil regulation — climate: quick check

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

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Question 1 · Single choice — select one

Which statement best describes how soils regulate climate?

Soils regulate climate by storing carbon in organic matter. Soils regulate climate through the balance between carbon storage and greenhouse gas emissions. Soils regulate climate by supporting vegetation that absorbs carbon dioxide. Soils regulate climate mainly through the decomposition of organic matter.

Question 2 · Single choice — select one

Why are peatlands among the world’s largest long-term stores of soil carbon?

They receive a continuous supply of carbon-rich sediments. Peatland plants absorb more carbon dioxide than plants in other ecosystems. Waterlogged conditions slow the decomposition of organic matter. Low temperatures prevent microorganisms from living in peat soils.

Question 3 · Single choice — select one

What is the most likely consequence of draining a peatland?

Plant growth increases, leading to greater long-term carbon storage. Methane production increases because microorganisms become more active. The amount of carbon entering the soil remains unchanged. Oxygen enters the soil, accelerating decomposition and releasing stored carbon dioxide.