Unit 1: The Living World: Ecosystems (College Board AP® Environmental Science)

Get ready for your College Board AP® Environmental Science exams with our revision resources. Find everything you need to revise this topic, so you can go into your exam confident and prepared. Teachers and examiners write all our resources, and they’re designed specifically for each exam board. We regularly update them to match the latest syllabus, so you’ll only revise the most accurate, up-to-date information. Explore the collection below to get started.

Introduction to Ecosystems

  1. Species Interactions in Ecosystems

Terrestrial Biomes

  1. Major Terrestrial Biomes

Aquatic Biomes

  1. Major Aquatic Biomes

The Carbon Cycle

  1. The Carbon Cycle

The Nitrogen Cycle

  1. The Nitrogen Cycle

The Phosphorus Cycle

  1. The Phosphorus Cycle

The Hydrologic (Water) Cycle

  1. The Hydrologic Cycle

Energy Flow & the 10% Rule

  1. Energy Transfers in Ecosystems

Introduction to Ecosystems

  1. Exam Questions

Terrestrial Biomes

  1. Exam Questions

The Carbon Cycle

  1. Exam Questions

The Nitrogen Cycle

  1. Exam Questions

The Phosphorus Cycle

  1. Exam Questions

The Hydrologic (Water) Cycle

  1. Exam Questions

Primary Productivity

  1. Exam Questions

Trophic Levels

  1. Exam Questions

Energy Flow & the 10% Rule

  1. Exam Questions

Food Chains & Food Webs

  1. Exam Questions

Free Response Questions

  1. Exam Questions