---
title: "Terraces — AP Human Geography Definition & Exam Guide"
description: "Terraces are flat steps cut into hillsides for farming on steep slopes. A key landscape-altering practice in AP Human Geo Topic 5.10, tied to erosion and carrying capacity."
canonical: "https://fiveable.me/ap-hug/key-terms/terraces"
type: "key-term"
subject: "AP Human Geography"
unit: "Unit 5"
---

# Terraces — AP Human Geography Definition & Exam Guide

## Definition

Terraces are step-like flat platforms cut into steep hillsides so farmers can grow crops on slopes, slowing water runoff and reducing soil erosion. In AP Human Geography, they're a classic example of an agricultural practice that alters the landscape (Topic 5.10, EK IMP-5.A.2).

## What It Is

Terraces turn a steep hillside into a staircase of flat fields. Each "step" holds soil and water in [place](/ap-hug/key-terms/place "fv-autolink"), so rain soaks in instead of rushing downhill and washing the topsoil away. That's the whole trick. Slopes that would otherwise be useless or destructive to farm become productive cropland. You see famous examples in the rice terraces of [Southeast Asia](/ap-hug/unit-5/agricultural-origins-diffusions/study-guide/0w8PoDg8fpwGgA1KPnjV "fv-autolink") (the Philippines, Vietnam, China) and the Inca terraces of the Andes in Peru.

In the CED, terraces show up in **EK IMP-5.A.2** as one of the [agricultural practices](/ap-hug/unit-3/cultural-landscapes/study-guide/04ci5UfeG5zOvfialbX5 "fv-autolink") that alter the landscape, alongside slash and burn, irrigation, deforestation, and draining wetlands. The geography insight is that terracing is a two-way street. Building and maintaining terraces reshapes the physical environment, and abandoning them reshapes it again. When upkeep stops, the steps collapse, erosion accelerates, and the hillside loses its ability to hold water. That maintenance angle is exactly what the AP exam likes to test.

## Why It Matters

Terraces live in **[Unit 5](/ap-hug/unit-5 "fv-autolink"): Agriculture and Rural Land-Use Patterns and Processes**, specifically **Topic 5.10 (Consequences of Agricultural Practices)**. They directly support learning objective **5.10.A**, which asks you to explain how agricultural practices have environmental and societal consequences. Terraces are the go-to example of a practice with a mostly *positive* environmental effect (erosion control, water retention) but a real societal cost (constant labor). That makes them a great contrast case. Most practices in EK IMP-5.A.2, like deforestation or [draining wetlands](/ap-hug/key-terms/draining-wetlands "fv-autolink"), degrade the land. Terraces protect it, but only as long as people keep doing the work. If an exam question asks you to connect agricultural practice to landscape change in both directions, terraces are your example.

## Connections

### [Slash and Burn/Shifting Cultivation (Unit 5)](/ap-hug/key-terms/slash-and-burnshifting-cultivation)

Terraces and [slash and burn](/ap-hug/key-terms/slash-and-burn "fv-autolink") are listed side by side in EK IMP-5.A.2, but they're opposite strategies for tough land. Slash and burn moves the farm when soil wears out; terracing fixes the farm in place and invests heavy labor to keep the soil from ever leaving. One is extensive and mobile, the other is intensive and permanent.

### [Land Cover Change (Unit 5)](/ap-hug/key-terms/land-cover-change)

Terracing is literally [land cover change](/ap-hug/key-terms/land-cover-change "fv-autolink") you can see from space. A forested or grassy slope becomes a carved staircase of fields. EK IMP-5.A.1 lists land cover change as a core environmental effect of agriculture, and terraces are one of the clearest visual examples to cite.

### [Soil Depletion (Unit 5)](/ap-hug/key-terms/soil-depletion)

Terraces exist to fight soil loss. By flattening the slope, they slow runoff so water and nutrients stay in the field instead of eroding downhill. If a question pairs steep terrain with soil conservation, terracing is almost always the answer.

### [Carrying Capacity (Unit 2)](/ap-hug/key-terms/carrying-capacity)

Terraces raise the [carrying capacity](/ap-hug/key-terms/carrying-capacity "fv-autolink") of mountainous regions by converting unfarmable slopes into cropland. This is how dense populations sustained themselves in places like the Andes and the Philippine highlands. It's a clean example of humans modifying the environment to support more people.

## On the AP Exam

Terraces are mostly an MCQ concept. Stems usually give you a scenario, like a farmer on steep slopes who needs to prevent erosion, and ask which practice solves it. Terracing is the answer whenever you see "mountainous," "steep slopes," and "erosion" together. Tougher questions flip the script and test abandonment. A common stem describes Peruvian farmers leaving centuries-old terraces for mechanized valley plots, then asks you to connect the practice to landscape change (more hillside erosion, less upland water retention). Another version ties terrace abandonment to rural-to-urban migration, since terraces demand sustained labor that disappears when young people leave. No released FRQ has used the term verbatim, but terraces work as strong evidence for any FRQ on LO 5.10.A asking you to explain environmental or societal consequences of agricultural practices.

## terraces vs Contour plowing

Both fight erosion on slopes, so they blur together. Contour plowing means plowing along the curves of a gentle slope, following its natural lines without reshaping the land. Terracing physically re-engineers a steep hillside into flat steps. Quick test for the exam: gentle slope plus plowing pattern means contour plowing; steep slope plus built flat platforms means terraces. Terraces are the one named in the CED (EK IMP-5.A.2).

## Key Takeaways

- Terraces are flat, step-like fields cut into steep hillsides that make farming possible on slopes while reducing soil erosion and runoff.
- The CED names terraces in EK IMP-5.A.2 as one of the agricultural practices that alter the landscape, under Topic 5.10 and learning objective 5.10.A.
- Terraces are the rare CED practice with a mostly positive environmental effect, since they conserve soil and retain water instead of degrading the land.
- Terraces require constant labor to maintain, so when rural populations migrate to cities, abandoned terraces collapse and erosion accelerates.
- Classic real-world examples are the rice terraces of Southeast Asia and the Inca terraces of the Peruvian Andes.
- On the exam, the trigger words "steep slopes" and "erosion" in the same stem almost always point to terracing.

## FAQs

### What are terraces in AP Human Geography?

Terraces are step-like flat surfaces cut into steep hillsides so crops can grow on slopes. They appear in Topic 5.10 (EK IMP-5.A.2) as an agricultural practice that alters the landscape, reducing erosion and helping the soil hold water.

### Are terraces good or bad for the environment?

Mostly good, which makes them unusual on the EK IMP-5.A.2 list. Terraces conserve soil and retain water on steep slopes. The catch is maintenance. When terraces are abandoned, they collapse and erosion gets worse than before, which is exactly the twist exam questions use.

### How are terraces different from contour plowing?

Contour plowing follows the natural curves of a gentle slope without changing its shape. Terracing rebuilds a steep hillside into flat steps. If the question says steep or mountainous terrain, the answer is terraces, the term the CED actually names.

### Where is terrace farming used in the real world?

The most cited examples are the rice terraces of Southeast Asia, like the Philippines, Vietnam, and southern China, and the Inca-built terraces of the Andes in Peru. The Peru case shows up in practice questions about what happens when terraces are abandoned for mechanized valley farming.

### Why do farmers abandon terraces?

Terraces demand sustained hand labor, and rural-to-urban migration drains that labor away. When younger generations leave for cities, terraces fall apart, hillside erosion accelerates, and upland water retention drops. This links agricultural practice (Unit 5) to migration patterns (Unit 2).

## Related Study Guides

- [5.10 Consequences of Agricultural Practices](/ap-hug/unit-5/consequences-agricultural-practices/study-guide/RAzF4S3Shg41OlgCRS59)

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