The world ocean | Middle school Earth and space science | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! Earth’s world ocean is connected by currents and gyres that form a global ocean conveyor belt, moving heat, nutrients, and water around the planet. This circulation shapes climate and supports ecosystems. Human activities, such as pollution and resource use, disrupt ocean systems and impact marine life worldwide. Sections: 00:00 Intro 00:38 Plastic pollution in the ocean and currents 01:00 Currents, gyres, and the ocean conveyor belt 01:52 Ocean pollution 02:34 Marine life and ocean zones 04:13 Humans and ocean systems 05:07 The world ocean ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc ------------------ Credits: “Midway Atoll aerial photo 2008” by U.S. Fish and Wildlife Service [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Midway_Atoll_aerial_photo_2008.JPG “Midway Atoll in the United States” by TUBS, licensed under a Creative Commons Attribution License (CC BY 3.0): https://commons.wikimedia.org/wiki/File:Midway_Atoll_in_United_States.svg https://creativecommons.org/licenses/by-sa/3.0/deed.en “Laysan Albatross colony on Midway Atoll NWR” by Wieteke Holthuijzen, licensed under a Creative Commons Attribution License (CC BY-SA 4.0): https://commons.wikimedia.org/wiki/File:Laysan_Albatross_colony_on_Midway_Atoll_NWR.jpg https://creativecommons.org/licenses/by-sa/4.0/deed.en “Eastern Island Cacophony” by Rachel Neville/Friends of Midway Atoll [public domain], via Friends of Midway Atoll: https://friendsofmidway.org/wp-content/uploads/2016/08/Eastern-Island-Cacophony.mp3 “Goonie on land but masters of flight” by Daniel Clark/U.S. Fish and Wildlife Service [public domain], via Flickr: https://www.flickr.com/photos/weedmandan/15675838829/in/album-72157625733127596/ “PMNM - Laysan Albatross And Debris” by David Slater/NOAA [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:PMNM_-_Laysan_Albatross_And_Debris_(28250723916).jpg “World map green” by Gaaarg, licensed under a Creative Commons Attribution License (CC BY-SA 3.0): https://commons.wikimedia.org/wiki/File:World_map_green.png https://creativecommons.org/licenses/by-sa/3.0/deed.en “Ocean Diamond cruise ship at Djúpivogur harbour” by Alexander Grebenkov, licensed under a Creative Commons Attribution License (CC BY 3.0): https://commons.wikimedia.org/wiki/File:Ocean_Diamond_cruise_ship_at_Dj%C3%BApivogur_harbour.jpg https://creativecommons.org/licenses/by/3.0/deed.en “Krabbenkutter Ivonne Pellworm” by Joachim Müllerchen, licensed under a Creative Commons Attribution License (CC BY-SA 2.0 DE): https://commons.wikimedia.org/wiki/File:Krabbenkutter_Ivonne_Pellworm_P5242390jm.JPG https://creativecommons.org/licenses/by-sa/2.0/de/deed.en “Maersk Elba” by Łukasz Golowanow from https://www.konflikty.pl/ [Public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Maersk_Elba.JPG “Hurricane Ivan” by NOAA Satellites [public domain], via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Hurricane_Ivan_(48711186578).gif “Beach trash” by Justin Dolske, licensed under a Creative Commons Attribution License (CC BY-SA 2.0): https://commons.wikimedia.org/wiki/File:Beach_trash_(30870156434).jpg https://creativecommons.org/licenses/by-sa/2.0/deed.en “Garbage Patches” by NOAA [public domain], via NOAA: https://marinedebris.noaa.gov/info/patch.html “Débris plastiques page de Famara” by Patrice78500, licensed under a Creative Commons Attribution License (CC BY-SA 4.0): https://commons.wikimedia.org/wiki/File:D%C3%A9bris_plastiques_page_de_Famara.jpg https://creativecommons.org/licenses/by-sa/4.0/deed.en “PMNM - Hauling derelict fishing nets” by National Marine Sanctuaries [public domain], via Flickr: https://flickr.com/photos/44124469278@N01/33963796612 “Green turtles amid marine debris” by Andy Collins/NOAA Office of National Marine Sanctuaries [public domain], via Flickr: https://www.flickr.com/photos/usfwshq/6741931287/