Tsunami waves are the undersea occurrence of earthquake exceeding 7.5 on Richter scale. Which one of the following statements regarding this is not correct?
- A.It often generates strong waves.
- B.The Pacific coasts are most vulnerable to Tsunami waves.
- C.Tsunami waves are also called high-energy tidal waves or seismic sea waves.
- D.Tsunami is a Latin word.
Correct answer
Explanation
The correct answer is D, Tsunami is a Latin word. The statement is not correct because tsunami is a Japanese word, from tsu (harbour) and nami (wave), meaning a harbour wave. Japan, with its long coast on the Pacific, has suffered many such waves through history. A tsunami is set off when a strong undersea earthquake, a volcanic eruption or a landslide suddenly moves a huge volume of seawater. In the deep ocean the waves are low but travel at hundreds of kilometres an hour; near the shore they slow down and pile up into walls of water. Option A is a correct statement, because such earthquakes do send out powerful waves. Option B is correct, because the Pacific Ring of Fire has the most undersea earthquakes. Option C is correct, because they are popularly called tidal waves and scientifically seismic sea waves, though they have nothing to do with tides. Exam tip: tsunami, Japanese for harbour wave; Indian Ocean tsunami, 26 December 2004.
Practice Questions
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