in a glass, there will definitely be small ripples
that appear, right?
Well, at sea the wind is much stronger.
But not all waves are the same. Some are
small, some are really big like
in surfing movies.
How come? It turns out that there are
several factors that determine the size of the waves.
waves.
First, wind speed. The
stronger the wind, the bigger the waves.
waves.
Second, how long the wind blows. If the wind
blows for a long time, the waves
will also get bigger. Third, the distance the wind
blows. Vetch. The wider the area of sea
exposed to the wind, the higher the waves
that can form.
That's why in the middle of the sea the waves are usually
bigger than those on the beach.
But waves don't just come from
the wind. There are two other things that can make
the sea choppy. Namely underwater earthquakes
and lunar gravity.
Tsunami is a wave from an underwater earthquake .
.
If an earthquake occurs on the seabed,
the movement of the earth's plates can push
seawater upwards and create
giant waves that we know
as tsunamis.
Tides, waves from the
moon's gravity. Meanwhile, the moon also
plays a role in the movement of sea water. The
moon's gravitational force pulls on water in the oceans
causing tides which can also
form waves.
So, waves don't always come from the wind.
the wind. [Music]
So if the wind stops, will the waves
disappear too?
The answer is not completely.
Even if the wind stops, the waves that have
formed can still continue to travel far
forward before finally weakening and disappearing.
disappearing.
This is called swell, a wave that continues to
move even though there is no wind.
It's like pushing a
small boat in a pond, even if you
stop pushing, the boat will still
move for a while before finally stopping. [Music]
So waves in the sea mostly
occur because of the wind blowing on the
surface of the water. But besides wind,
underwater earthquakes and lunar gravity can also
create large waves such as
tsunamis or tidal waves.
And these waves don't just stop right away .
.
Even after the wind has died down, the waves
can still continue to move.
Well, now you know the answer.
Don't forget to like, subscribe, and comment
below if you have any
other unique questions for us to discuss in the
next video. Thank you for watching this
video from the Brill Fact channel,
where small questions have
big answers. See you. [Music]
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