Read the sentences below carefully, and then put them in the correct order to make a meaningful reading: (Number 1 and number 12 have done first for you)
1/ Tsunami, Japanese word meaning “harbor wave,” used as the scientific term for seismic sea waves that can cause catastrophic damage when they hit a coastline.
2/ Since 1819, about 40 tsunamis have struck the Hawaiian Islands.
3/ Tsunamis can be generated by an undersea earthquake, an undersea landslide, the eruption of an undersea volcano, or by the force of an asteroid crashing into the ocean.
4/ When the ocean floor is uplifted or offset during an earthquake, a set of waves is created similar to the concentric waves generated by an object dropped into the water.
5/ The most frequent cause of tsunamis is an undersea earthquake.
6/ Most tsunamis originate along the Ring of Fire, a zone of volcanoes and seismic activity, 32,500 km (24,000 mi) long, which encircles the Pacific Ocean.
7/ A tsunami can have wavelengths, or widths (the distance between one wave crest to the next), of 100 to 200 km (60 to 120 mi), and may travel hundreds of kilometers across the deep ocean, reaching speeds of about 725 to 800 km/h (about 450 to 500 mph).
8/ People onboard a ship passing over it would not even notice the tsunami.
9/ A tsunami is not one wave but a series of waves.
10/ Upon entering shallow coastal waters, however, the waves suddenly grow rapidly in height.
11/ In the deep ocean, the waves may be only about half a meter (a foot or two) high.
12/ When the waves reach the shore, they may be 15 m (50 ft) high or more.
- 1 - 3 -5 -4 -6 -2 - 7- 9- 11- 8- 10-12
- 6 -2 - 7- 9- 11- 8- 10-12 - 1 - 3 -5 -4
- 6 -2 - 7- 9- 1 - 3 -5 -4 - 11- 8- 10-12
- 1 - 3 - 7- 9- 11- 8- 10-5 -4 -6 -2- 12