Social Sciences and History / Unit 11 SSH 1010 worked example, 60 to 90 seconds
Which Density Answers Which Question?
The idea
The exam asks which density measure answers a question, and the anchor's three, with Finlayson's use of them, settle it. Arithmetic density, population over total land area, answers how crowded a country is on average and nothing about its farmland. Physiological density, people per unit of arable land, answers how much pressure the population puts on the land that can feed it; a desert country with a fertile strip scores low on the first and high on the second. Agricultural density, farmers per unit of arable land, answers how the land is worked: many farmers per field means labor-intensive, low-technology farming; few means mechanized. Carrying capacity sits behind all three as the ceiling the environment can sustain.
In practice
Given "is Egypt crowded", arithmetic says no, physiological says very. Given "how mechanized is a country's farming", agricultural density, low where machines replace hands. Given "does this population strain its food-producing land", physiological. Given "how many people per square kilometer of the whole country", arithmetic. Ask whether the question is about all land, food land, or the people who farm it.
Where people slip
The trap is reading a low arithmetic density as room to grow; the anchor's point is that arable land, not area, feeds people. The second trap is agricultural against physiological: both use arable land, but one counts everyone and the other counts farmers.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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