Grab your FREE copy of the unit 1 AP Environmental Science Ultimate Review Packet study guide 👉https://www.ultimatereviewpacket.com/courses/apes 00:00 Introduction 01:14 Introduction to Ecosystems (1.1) 03:09 Terrestrial Biomes (1.2) 04:50 Aquatic Biomes (1.3) 06:32 Carbon Cycle (1.4) 09:05 Nitrogen Cycle (1.5) 10:05 Phosphorus Cycle (1.6) 12:06 Hydrologic or Water Cycle (1.7) 13:37 Primary Productivity (1.8) 16:01 Trophic Levels & The 10% Rule (1.9 - 1.10) 17:58 Food Webs (1.11)