# Physical Geography and Geomorphology

History I · Geography · https://tryals.app/learn/history-i/physical-geography-and-geomorphology

## Geography as a Price List

Geography does not determine history. But the stage is not neutral: **geography sets the price list, not the outcome**. People choose; the landscape decides what those choices cost. 

Before railways, overland transport was ruinously expensive. In the Roman world, shipping a cargo across the **entire Mediterranean** cost roughly the same as carting it **100 km inland**. 

This cost ratio explains why pre-industrial cities clung to coasts and rivers. Rivers unify basins, while mountains fragment them into isolated political units.

## Soil and the Moving Stage

Soil types dictate settlement limits across the **longue durée**, shaping political ceilings invisibly over generations.

| Soil Type | Consequence |
| --- | --- |
| **Alluvial** | Renewed annually, supports dense populations |
| **Loess** | Deep, fertile, easily worked |
| **Volcanic** | High fertility despite risks |
| **Leached tropical** | Nutrients wash out fast |
| **Karst limestone** | Water drains underground |

Geomorphology proves the stage moves. Rivers silt up, turning ports like Ephesus inland. **Never read modern terrain back onto the past.**

## Practice questions

5 of this lesson's 11 practice questions, with answers. The full set is in the app.

### 1. What makes the Nile such an unusually favourable river?

A. Its course has never shifted in recorded history
B. It floods predictably and deposits fertile silt annually
C. Desert on both sides walls the valley
D. It flows north while the prevailing wind blows south, so it is navigable both ways

**Answer:** B. It floods predictably and deposits fertile silt annually; C. Desert on both sides walls the valley; D. It flows north while the prevailing wind blows south, so it is navigable both ways

**Why:** Self-renewing agriculture, two-way navigation, and free flanking defences. Egypt’s three thousand years of political continuity is not a mystery, it is a river with unusually good terms.

Page: https://tryals.app/practice/history-i/physical-geography-and-geomorphology/what-makes-the-nile-such-an-unusually-favourable-river

### 2. The same mountain range that isolated a region in 1500 barely slows a lorry today. What does that do to geographical explanation?

A. It makes geography's effects historically specific
B. It confirms that geography determines outcomes until technology overcomes it
C. It means geographical explanations apply only to pre-modern history
D. It shows geography never had real effects, only technological ones

**Answer:** A. It makes geography's effects historically specific

**Why:** A barrier is a cost and the cost depends on the technology available, so geographical claims carry an implicit date. That is the discipline's honest formulation, the stage has opinions and they change, and it is what separates a usable geographical argument from a determinist one.

Page: https://tryals.app/practice/history-i/physical-geography-and-geomorphology/the-same-mountain-range-that-isolated-a-region-in-1500-barely-slows-a

### 3. Sort each site: **still a port** or **killed by sediment**?

**Answer:**

- Killed by sediment: Ephesus, Bruges, Ostia
- Still a port: Marseille, Alexandria, Istanbul

**Why:** Three great ports that ended not through conquest but through silt. Nobody sacked Ephesus into being 5 km inland, the river simply kept arriving.

Page: https://tryals.app/practice/history-i/physical-geography-and-geomorphology/sort-each-site-still-a-port-or-killed-by-sediment

### 4. A river that has shifted course since antiquity can make an ancient settlement's siting look irrational.

**Answer:** True

**Why:** True. Ephesus sits stranded miles from the sea its harbour once opened onto, and Ostia the same. Reasoning about ancient choices from modern terrain silently assumes a stability the landscape does not have, which is why geoarchaeology reconstructs the contemporary surface first.

Page: https://tryals.app/practice/history-i/physical-geography-and-geomorphology/a-river-that-has-shifted-course-since-antiquity-can-make-an-ancient

### 5. Put the self-inflicted Mediterranean erosion cascade in order.

**Answer:**

1. Slopes are deforested for timber, fuel, and pasture
2. Rain strips the exposed soil from the hillsides
3. Sediment fills the valley floor and blocks drainage
4. Marshland spreads across the plain
5. Malaria arrives and the plain is abandoned

**Why:** The classical Mediterranean did a great deal of this to itself. Erosion looks like a natural process, and a large share of it is a decision taken uphill a century earlier.

Page: https://tryals.app/practice/history-i/physical-geography-and-geomorphology/put-the-self-inflicted-mediterranean-erosion-cascade-in-order