What is a Tsunami?(Science This Week)
Study the following discussion and answer the questions.
Malison :
I think tsunamis are just tidal waves that are bigger and
faster than normal waves.
Veronica :
No. Tsunamis are not related to tidal activity and wind
Malison :
I don’t think so. Tsunamis in the main do not come from gravity or
wind, but they can affect tsunami size.
it.
1) Who do you think is correct? Give reason to your answer.
2) How often do tsunamis occur on average?
3) Why are tsunamis and earthquakes hard to predict?
Answers
Answer:
Although both are sea waves, a tsunami and a tidal wave are two different and unrelated phenomena. A tidal wave is a shallow water wave caused by the gravitational interactions between the Sun, Moon, and Earth ("tidal wave" was used in earlier times to describe what we now call a tsunami.) A tsunami is an ocean wave triggered by large earthquakes that occur near or under the ocean, volcanic eruptions, submarine landslides, or by onshore landslides in which large volumes of debris fall into the water.
In the wake of Indonesia's devastating tsunami, questions have arisen about what could more have been done to save lives. But natural disaster detection and preparedness takes more than technological know-how.
On the average, two tsunamis occur per year throughout the world which inflict damage near the source. Approximately every 15 years a destructive, ocean-wide tsunami occurs.
Explanation:
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