---
title: "AP Environmental Science Key Terms"
description: "844 AP Environmental Science key terms and definitions organized by AP® Course and Exam Description unit."
canonical: "https://fiveable.me/ap-enviro/key-terms"
type: "key-terms-hub"
subject: "AP Environmental Science"
---

# AP Environmental Science Key Terms

## Overview

844 AP Environmental Science key terms and definitions organized by AP® Course and Exam Description unit.

## Units

- [Unit 1: Unit 1 – The Living World: Ecosystems](/ap-enviro/key-terms/unit/1): 100 terms across 11 topics
- [Unit 2: Unit 2 – The Living World: Biodiversity](/ap-enviro/key-terms/unit/2): 58 terms across 7 topics
- [Unit 3: Unit 3 – Populations](/ap-enviro/key-terms/unit/3): 60 terms across 9 topics
- [Unit 4: Unit 4 – Earth Systems & Resources](/ap-enviro/key-terms/unit/4): 80 terms across 9 topics
- [Unit 5: Unit 5 – Land & Water Use](/ap-enviro/key-terms/unit/5): 130 terms across 17 topics
- [Unit 6: Unit 6 – Energy Resources & Consumption](/ap-enviro/key-terms/unit/6): 109 terms across 13 topics
- [Unit 7: Unit 7 – Atmospheric Pollution](/ap-enviro/key-terms/unit/7): 77 terms across 8 topics
- [Unit 8: Unit 8 – Aquatic & Terrestrial Pollution](/ap-enviro/key-terms/unit/8): 138 terms across 15 topics
- [Unit 9: Unit 9 – Global Change](/ap-enviro/key-terms/unit/9): 92 terms across 10 topics

## Related Resources

- [AP Environmental Science subject hub](/ap-enviro)
- [All AP® key terms](/key-terms)

## About This Document

Canonical Fiveable pages are available as Markdown at the same path plus `.md`.

- [llms.txt](https://fiveable.me/llms.txt): index of Fiveable's sections and URL patterns
- [llms-full.txt](https://fiveable.me/llms-full.txt): complete subject and unit listing
- [MCP server](https://fiveable.me/mcp): call Fiveable as tools instead of fetching pages (`https://fiveable.me/api/mcp`)
- [MCP server for AP teachers](https://fiveable.me/mcp/teachers): a teacher's classes, assignments and AP-rubric grading (`https://fiveable.me/api/mcp/teacher`)