Which One of the Following Is True Regarding Tsunamis

question 161

Multiple Choice

Which one of the following is true regarding tsunamis?

• A)They travel as deep-water waves at speeds greater than the speed of sound in water so they hit the coast followed by a massive rumble like a sonic boom.
• B)Their wave heights decrease and wavelengths increase as they move into shallower water.
• C)They are started by fault-induced, horizontal shifts in the sea floor that suddenly propel great masses of water upwards like spreading ripples in all directions.
• D)They occur in the open ocean like fast surface waves travelling at hundreds of kilometres per hour, wavelengths are hundreds of kilometres, and wave heights < a metre.

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