Topic 5.1 - The Open Ocean Ecosystem

Episode 3: The Open Ocean https://oceanambassadors.org/ocean-zones-explained/ Explore the vast open ocean and discover how it shapes life on Earth. In this bite-sized revision lesson, you'll identify the world's five interconnected oceans and learn about the major ocean depth zones, from the sunlit epipelagic zone to the deepest benthic habitats. We'll also examine the vital role oceans play in regulating Earth's climate, acting as carbon sinks, producing oxygen, and buffering global temperatures. Finally, you'll review the three major ocean regions—polar, temperate, and tropical—and understand their significance in the Cambridge AICE Marine Science syllabus. By the end of this episode, you'll be well prepared to answer exam questions on the open ocean and its global importance.