What is a Tsunami 2025-09-04 ¿ÀÈÄ 4:40:00 À̼öÁø

 

What is a Tsunami? 

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Description: 




A tsunami is a series
of large, powerful waves caused by underwater earthquakes or tectonic shifts.
When the ocean floor moves suddenly, it releases energy that creates waves
traveling at high speeds. As these waves reach shallow waters near the shore,
they grow taller and can cause significant destruction.
 



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Transcription:  




What is a tsunami? 




¡°I don¡¯t know.¡± 



Tsunami is a series of
giant waves.
 



In Japanese, tsunami
means 'Harbor Wave'.
 



¡°And in Chinese?¡± 



Oh, just listen. 



 



A wave is created when
energy passes through water.
 



Moving air or wind
provides energy to water, forming regular waves.
 



While on the ocean
floor, when a tectonic plate suddenly slides beneath the other, the resulting
earthquake releases a tremendous amount of energy.
 



This energy spreads
outward from the point of earthquake, triggering waves that can form tsunami.
 



Initially, these waves
are small in size but they travel at great speeds.
 



However, when the
waves approach the shore, the rising seabed obstructs the energy of waves.
 



This slows down the
speed of waves.
 



But the energy flux
must remain constant, leading to an increase in the height of waves, thus
resulting in tsunami.
 



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Questions: 




1. What is a
tsunami? 
 



2. Where does the word
"tsunami" come from?  
 



3. How does a tsunami
form?
 

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