Tsunamis are a serious threat to humanity

Categories: Geology Humanity Nature Sea Tsunami A Natural Disaster Water

Essay, Pages 3 (683 words)

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General Purpose: To Inform

Specific Purpose: To inform the audience that tsunamis are a serious threat to humanity, and it's essential to take action and survive this natural disaster.

Central Idea: The greatest defense to counter any tsunami is the initial warning that gives permission to people to seek higher ground.

INTRODUCTION

(Attention): a tsunami is a group of ocean waves that cast a rise of water, constantly reaching heights of over 100 feet.
(Reveal Topic): These high waves can produce destruction all over the place when they smash on shore.
(Relevancy): People that experience a tsunami must remember that the emergency may not have passed with the first wave and must wait for an official word that it's clear to return to the defenseless locations.
(Credibility): I have done extensive research on this topic, and today, I share with you my findings.
(Preview): The greatest defense to counter any tsunami is the initial warning that gives permission to people to seek higher ground

Transition: Let's begin by talking about these impressive waves that are normally caused by large earthquakes under the sea at the border of tectonic plates.

BODY

I. When the ocean floor, at the plate's boundary, falls and rise abruptly, it forces out the water above it and then sends off the waves that will develop into a tsunami.

A. Almost all tsunamis, around 80 percent, occur with an area of the Pacific Ocean called "Ring of Fire," which is an active geologically area where tectonic changes make earthquakes and volcanos prevalent.

B. Tsunamis rush over the sea at a maximum speed of 500 miles or 805 Kilometers an hour, which is almost as fast as a jet airplane.

II. In the distant ocean, tsunamis may show around a foot high.

A. As the waves reach the shoreline and enter shallow water, they wind down and start to grow in height and energy.

B. The high points of the waves move more rapidly than their bottom do, which makes them rise abruptly.

III. A tsunami's trough, which is the low point below the wave's crest, many times makes it to the shore first.

A. When it reaches the shore, it then creates a vacuum effect that absorbs coastal waters toward the sea and then reveals the harbor and sea floors.

B. When the seawater retreats, it is a critical warning sign that a tsunami is coming, due to the fact that the wave's crest and its immense volume of water usually arrive at the shore in around five minutes.

IV. A tsunami is normally consisting of a series of waves, also known as a wave train; thus its devastating force may be magnified as subsequent waves reach the seashore.

A. People that experience a tsunami must remember that the emergency may not have passed with the first wave.

B. A few tsunamis don't arrive on shore as enormous breaking waves. However, rather than resemble a fast rushing tide that floods the areas along a coast.

V. If you happen to live or you are by the ocean, go to higher ground right away.

A. If you see the ocean receding to expose the seafloor, go to higher ground right away.

B. Don't wait by the shore until you see it approaching, because a tsunami travels quicker than a person can run.

CONCLUSION

In conclusion, When the ocean floor, at the plate's boundary, falls and rise abruptly, it forces out the water above it and then sends off the waves that will develop into a tsunami. In the distant ocean, tsunamis may show around a foot high. A tsunami's trough, which is the low point below the wave's crest, many times makes it to the shore first. A tsunami is normally consisting of a series of waves, also known as a wave train; thus, its devastating force may be magnified as subsequent waves reach the seashore. If you happen to live or you are by the ocean, go to higher ground right away.

Just remember, the greatest defense to counter any tsunami is the initial warning that gives permission to people to seek higher ground.