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
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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/ Receive SMS online on sms24.me
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