Explanation
Passage
The sea-waves can cause a significant damage when they crash the lands. Under a clear sky and calm sea, a wall of water may appear twenty or thirty feet high over beaches, destroying houses and drowning residents in its path.
When a submarine earthquake happens, it is likely to cause an enormous amount of shock, disturbing the quite waters of the deep ocean. This disturbance transfers to the surface and forms a huge swell. The swells in the ocean are nearly a mile wide and rise to various multiple of ten feet in height.
Nothing was accomplished about tsunamis until after the second World War. These waves travel towards the land hundreds of miles an hour, and you can imagine that how they would crash!
Question 1: An aspect of the waves is the fact that they
(A) are produced by deep swells
(B) often strike during clear weather
(C) arise under conditions of cold temperature
(D) are formed in concentric patterns
Question 2: These destructive waves are caused by
(A) storms
(B) concentric time belts
(C) underwater earthquakes
(D) seismic changes
Question 3: The normal maximum width of the waves is approximately
(A) one mile
(B) five miles
(C) five feet
(D) ten feet
Question 4: Nothing was done about the waves until
(A) a solution was found
(B) deaths occurred
(C) severe damage was incurred
(D) the outbreak of World War II
Question 5: The motion of the waves has been calculated at a speed of
(A) 1 kilometer an hour
(B) 50 miles an hour
(C) 100 miles an hour
(D) more than a hundred miles an hour
