----- Nội dung dịch tự động từ ảnh -----
The passage and mark the letter A, B, C or D the correct answer to each of the following questions
Tsunamis, whose name derives from the Japanese expression for "high wave in a
harbour", are giant sea waves. These waves are quite different from storm surges. They are
also referred to by the general public as tidal waves although they have nothing to do with
tides. Scientists often refer to them as seismic sea waves, which is far more appropriate
because they are often the result of undersea seismic activity.
Tsunamis can be caused when the sea floor suddenly moves, during an underwater
earthquake or volcano, and the water above the moving earth is suddenly displaced. This
sudden shift of water sets off a series of waves. These waves can travel great distances, at
speeds close to 700 kilometres per hour. In the open ocean, tsunami waves are not very
high, often no more than one or two metres. It is when they hit the shallow waters near the
coast that they increase in height, possibly up to 40 metres.
Question 33. The passage mainly discusses
A. tornado
B. tides
C. tsunamis
D. storm surges
Question 34. The word "them" in the passage refers to
A. tidal waves
B. tornado
C. storm surges
D. sea waves
Question 35. All of the following is true about tidal waves EXCEPT
A. they are another name for tsunamis.
B. they are caused by sudden changes in high and low tides.
C. this term is not used by the scientists.
D. the name refers to the same phenomenon as seismic sea waves.
Question 36. The word "displaced" in the passage is closest in meaning to
A. located B. not pleased
C. filtered
D. moved
Question 37. The word "shallow" in the passage mostly means
A. not clear B. tidal
C. coastal
D. not deep