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Why are there two tides a day? - Elise Cutts

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TEDEd Animation

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In the 17th century, Isaac Newton offered the first gravitational explanation of tides. As he correctly identified, tides are choreographed by the motions of celestial objects, and Earth’s tides in particular are mostly driven by the Moon. But the precise nature of this relationship is actually quite nuanced. Elise Cutts explains how the Sun and Moon are responsible for the tides.

Watch the video and finish the Think section to complete the lesson.


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TED-Ed Animations feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TED-Ed Animation? Nominate yourself here »

Meet The Creators

  • Educator Elise Cutts
  • Director Rémi Cans, Atypicalist
  • Narrator Alexandra Panzer
  • Storyboard Artist Marie Zivec, Haimeric Pays
  • Animator Marie Zivec, Haimeric Pays
  • Sound Designer Amanda P.H. Bennett, cAMP Studio
  • Composer Salil Bhayani, cAMP Studio
  • Produced by Gerta Xhelo, Abdallah Ewis
  • Editorial Director Alex Rosenthal
  • Editorial Producer Dan Kwartler
  • Fact-Checker Charles Wallace

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