Which one of the following is true of most tsunamis?
A) They are faster than seismic surface waves.
B) Their wave heights decrease and wavelengths increase as they move into shallower water.
C) They are usually started by sudden movement on a megathrust fault, and they have wavelengths that are many kilometers long and wave heights of less than a meter.
D) They only occur in the Pacific Ocean basin.
Answer: C
You might also like to view...
The pesticides that also function as endocrine disruptors cause disease by
A) causing excessive secretion of stomach acids. B) mimicking the effects of estrogenic hormones. C) causing muscle spasms and cramping in major muscle groups. D) greatly reducing the ability of the intestines to absorb nutrients.
Which of the following types of solid is most likely to have a low, but well defined, melting point?
A) amorphous B) ionic C) molecular D) network covalent
Which wavelengths in the electromagnetic spectrum are most likely to reach Earth's surface?
A. X-rays B. Gamma rays C. Visible light and heat D. Ultraviolet (UV) radiation
At a mid-ocean ridge spreading center, what happens?
a. the plates are moving past each other b. the plates are moving away from each other c. the plates are moving toward each other d. one plate is being subducted beneath another e. both plates are being subducted