About this video
This video talks about how China is building a special underwater wall to find submarines. It uses sound waves to listen for submarines and knows where they are. The wall helps keep China safe from submarines that might try to come close.
🧠 Quiz & Trivia
Test your knowledge after watching!
Q1 What is the deepest part of the ocean called?
Answer: Challenger Deep
Q2 What do submarines use to move underwater?
Answer: Engines and propellers
Q3 What kind of sound waves does this underwater wall use?
Answer: Acoustic sensors
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