The video owner has disabled playback on external websites.
This video is no longer available on YouTube.
This video cannot be played right now.
Watch on YouTube
Unlock AI-Powered Learning Tools
Sign up to access powerful tools that help you learn faster from every video.
Why are there two tides a day? - Elise Cutts
AI Summary
This animated science video explains why Earth experiences two tides per day, covering gravitational forces, the Earth-Moon orbital relationship, and how celestial mechanics create tidal bulges. Learners will acquire scientific vocabulary including 'tidal bore,' 'gravitational pull,' 'tidal bulge,' 'spring tides,' 'neap tides,' and 'tidal locking.' The video connects ancient history with modern physics, making it excellent for practicing comprehension of science communication that blends narrative storytelling with clear technical explanations about astronomy and physical science.
Learning Stats
CEFR Level
Total Words
Unique Words
Difficulty
Subtitles (35 segments)
DownloadIn 326 BCE, the mighty army of Alexander the Great was exhausted.
Tired of monsoon rains and fruitless fighting in India, Alexander’s forces mutinied and demanded a retreat.
But their bad luck followed them home. While marching along the Indus River, the water’s current suddenly reversed and a massive wave crashed down on the weary soldiers.
This unexpected event was a tidal bore, a phenomenon that occurs when extremely high tides push seawater up a river.
The wave was likely quite the shock for Alexander, who was accustomed to the Mediterranean’s mild tides.
But tidal bores are just one of many ways tides can surprise.
2,000 years after Alexander, Isaac Newton deciphered the laws of gravity and offered the first gravitational explanation of tides.
Full subtitles available in the video player
Key Vocabulary (24)
The alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun. It can also refer to a powerful surge of a particular feeling or quality.
Relating to or affected by the tides of the sea. It describes phenomena, locations, or objects that follow the rhythmic rise and fall of ocean levels caused by gravitational forces.
The large round object that circles the Earth and shines at night. It reflects light from the sun and appears in different shapes throughout the month.
Grammar in This Video
Practice with Exercises
Generate vocabulary, grammar, and comprehension exercises from this video
Comments (0)
Login to CommentSign up to unlock full features
Track progress, save vocabulary, and practice exercises
Interactive Mode
Quiz
Correct answer:
Related Videos
Homer Simpson Best Moments (Part 4)
Your Tattoo is INSIDE Your Immune System. Literally
The physics behind Einstein’s most famous equation - Lindsay DeMarchi and Fabio Pacucci
The epic Nordic legend of the monster slayer - Iseult Gillespie
Inside Out 2 - All Clips From The Movie (2024) Pixar
TED-Ed
Quiz
Correct answer:
Quizzes appear as you watch the video
Memory Tip
From this video
Start learning languages for free
