Quick-Fire Review: Water, Soil and Food Production
A cotton shirt, a steak dinner and a ten-minute shower all draw on the same account, and rain falling on land is the only thing paying into it.
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Quick-Fire Review: Water, Soil and Food Production
This is a fast pass through the water, soil and food production material in Environmental Systems and Societies, with eleven questions, each one followed by the answer and the reasoning that earns the mark.
What this review covers
Water cycles and water scarcity. Where the planet's liquid fresh water actually sits, what happens to a town's water cycle when the ground is paved over, and the difference between having too little water and having no way to deliver it.
Dams, aquifers and the price of water. A per-person water calculation against the scarcity threshold, the sediment a reservoir traps, and what over-pumping does to a coastal aquifer.
Soil formation and soil degradation. Why soil counts as non-renewable on a human timescale, how irrigation in a dry climate salinises a field, and which farming practice lets a slope wash away.
Food production and food security. The parts of food security beyond production, and what a fishery is actually promising when it takes the maximum sustainable yield.
How to use it
Answer each question before the host gives it away. The pause is there for exactly that. If you get one wrong, the reason that follows is the part worth repeating, because that is where the marks live.
The ones that catch people out are groundwater against the water you can see, physical against economic scarcity, and food security against food production. Each turns on a single distinction, so say the distinction out loud before you say the answer.
Replay the whole thing the night before, and once more on the way to the exam.
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