老师：Hello everyone. Welcome to video time. Today in this class, you will collect information about the cause and the damage of a tsunami. And you will also learn about Santi's efforts to predict a tsunami.
老师：1St, let's come to two pictures here. By seeing these pictures, what's natural disaster is shown in the pictures? Doing. Very good, someone says. 2 pictures are showing tsunami. Well, what is a tsunami? And what causes it, as well as damage? Don't worry, today we are going to explore these three questions. Now let's come to see some basic information. Read the sentences about the formation and effects of tsunamis, then match each sentence with the correct picture.
老师：The three sentences you can see here are showing us some basic information. 1St, please read together with me. Sentence a, tectonic plates push together. By the way, do you know what tectonic plates mean? Yes, let's say tectonic place in Chinese. And sentence being a series of waves expands in all directions. Do you know the word expand here? Very good in Chinese. Well, today I'd like to give you this English meaning. In English, expand means to become bigger in size.
老师：Okay, now let's move on to sentence C. Whole sections of cities are destroyed. Have you finished? Very good. Now let's come to see these pictures. The first one on the left, what is the picture is showing to us? Yes. Sentences, whole sections of cities are destroyed. And then let's move on to the second one. Yes, sentence. A tectonic place here. And we could see the place in the picture. And the last one, okay, that is sentence me. Okay. These are the basic information for tsunami in order to get more information about it.
老师：Now let's move on to a video. And then you have another activity to do while watching the video. Let's say decide whether these statements are true or false. There are three statement here. Now I'd like to give you one minute to read through these sentences. Have we finished? Good. Now, video time.
学生：The warnings are few, the signs are sudden, the ground shakes, the tide goes into reverse. A great roaring sound fills the air. And then, it strikes, wave after wave of crashing, crushing water. And when it is over, nothing is left.
学生：A tsunami, the word in Japanese means harbor wave. Japan has been hit by many tsunamis in its history as a result of its location. It lies across the edges of four tectonic plates. Most earthquakes are born in such places. When two tectonic plates push together, the earthquake sends enormous amounts of energy up through the ocean. A series of waves expands in all directions. In deep water, these waves travel fast, up to 500 miles an hour, but reach a height of only a few feet. A passing ship may not even notice them, but as the wave center shallow wate
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