2. Unit 7 Tornados Deborah Soong

3. Teaching Activities Index

4. Teaching Activities 1st period 1. Warm-upWarm-up 2. The Vocabulary, and Idioms & Phrases within Paragraphs 1-3The Vocabulary, and Idioms & Phrases within Paragraphs 1-3 3. Reading – Paragraphs 1-3Reading – Paragraphs 1-3 2nd period 1. The Vocabulary, and Idioms & Phrases within Paragraphs 4-6The Vocabulary, and Idioms & Phrases within Paragraphs 4-6 2. Reading – Paragraphs 4-6Reading – Paragraphs 4-6 3. Post-readingPost-reading 3rd period 1. Word FileWord File 2. Sentence PatternsSentence Patterns 3. ExpansionExpansion 4. Writing PracticeWriting Practice 4th period Part II Oral & Listening - Unit 6Unit 6

5. Warm-up Vocabulary Idioms & Phrases Reading~ Paragraphs 1-3

7. TFStatements 1. Tornados are short-lived and weak types of storms. 2. Tornados are predictable and preventable with modern technology. 3. From the moment a tornado forms until it reaches the ground, it is usually just a few minutes. 4. Like a typhoon, a tornado’s path is usually wide. 5. Tornados may totally destroy all of the houses on one side of a road while leaving those on the other side intact.

8. TFStatements 6. A tornado may open the doors of a car, pull the driver and the passengers out and then break the car into pieces. 7. Tornados are accompanied by lightning and roaring noises. 8. Tornados are especially common in the US. 9. In the US, tornados most often occur during fall and winter. 10. It is possible to avoid the damage that tornados cause. Back

9. Listen to paragraphs 1-3. Skip

10. Now, answer the following questions.

11. Match the above items with those below. ______ 1. twisters ______ 6. a powerful vacuum ______ 7. rocks, cars, or houses ______ 9. twisting columns of air (A) another name for tornados (B) what a tornado may suck up (C) what a tornado is made up of (D) what the center of a tornado is ADBCADBC

12. Reading

13. No other types of storms are so powerful and destructive as tornado. No other + N(P)1 + be + so + Adj + as + N(P)2 No other types of storms are so powerful and destructive as tornados. → Tornados are the most powerful and destructive types of storms. → Tornados are more powerful and destructive than any other kind of storms.

14. They are often called “twisters” as they are made up of twisting columns of air. as 為連接詞，其語義相當於 because ，用 來表示「原因」。 As I was very tired, I went to bed early last night. be made up of = consist of; be composed of 由 … 組成 This class is made up of 20 boys and 22 girls. Next

15. They are often called “twisters” as they are made up of twisting columns of air. They are often called “twisters” as they are made up of twisting columns of air. → Tornados are often named “twisters,” for they spin in the shape of tall, narrow pipe.

16. They achieve incredible wind speeds, in fact, the highest on earth. 其他與 speed 搭配的動詞尚有： 加速： gather/increase/pick up/gain/put on speed  減速： decrease/lower/ reduce/slacken speed Once outside the station, the train began to gather speed. in fact 事實上 = actually; in reality; as a matter of fact in fact, the highest on earth 為插入的補充用語。 Next

17. They achieve incredible wind speeds, in fact, the highest on earth. They achieve incredible wind speeds, in fact, the highest on earth. → Tornados reach amazingly high wind speeds; actually, the wind speed is the highest in the world.

18. The extreme wind force is believed to be the main reason for the enormous damage that is associated with tornados. be associated with = be connected with; have (something) to do with 與 … 有關 Smoking has been associated with lung cancer. Next

19. The extreme wind force is believed to be the main reason for the enormous damage that is associated with tornados. 原句＝ → It is believed that the extreme wind force is the main reason for the great damage (that) tornados cause/caused by tornados. → People believe that the extreme wind force is the leading cause of severe tornado damage.

20. Proof of this exists in the manner in which buildings collapse when they are struck by a tornado. in which 引導形容詞子句修飾先行詞。 I was impressed by the manner in which she handled the financial crisis of her company. Proof of this exists in the manner [in which buildings collapse when they are struck by a tornado]. → This relation between extreme wind speeds and tornado damage is proved by the way buildings fall down when hit by a tornado.

21. The walls on the southwest, which are normally exposed to the strongest winds, fall inward from the pressure of continued winds. from : because of ; owing to The police found that the man died from drinking too much.

22. It is often difficult for scientists to predict precisely when and where a tornado is likely to appear. It is often difficult for scientists to predict precisely when and where a tornado is likely to appear. → Scientists often find it hard to predict the exact time when and the exact place where a tornado may occur.

23. Due to this uncertainty, it is difficult to provide sufficient warning in time to save lives. Due to this uncertainty, it is difficult to provide sufficient warning in time to save lives. → This uncertainty makes it hard (for scientists) to give people enough warning in order to save their lives in time.

24. From the moment a tornado forms until it reaches the ground, it is usually not much more than a few minutes. From the moment a tornado forms until it reaches the ground, it is usually not much more than a few minutes. → A tornado forms and reaches the ground within a few minutes. → It usually takes only a little more than a few minutes for a tornado to form and touch the ground.

25. At first, the funnel of the tornado is mainly a white-like color. At first, the funnel of the tornado is mainly a white-like color. → In the beginning, the funnel-shaped tornado is chiefly white in color.

26. Once a tornado has touched down, it becomes darker because of all the material it sucks up. Seen from the ground, it looks like an enormous cloud moving from the sky toward the earth. Seen from the ground, it looks like an enormous cloud moving from the sky toward the earth. → When/If it is seen from the ground, the tornado looks like a huge cloud that is moving from the sky to the earth.

27. This can include rocks, branches of trees, cars, and even parts of buildings, or houses.

28. The low-pressure center of a tornado is such a powerful vacuum that it can tear the roofs from houses or suck the corks from bottles. The low-pressure center of a tornado is such a powerful vacuum that it can tear the roofs from houses or suck the corks from bottles. → A tornado’s low-pressure center is a vacuum which is so powerful that it can break the roofs off houses or pull the corks from bottles.

29. An average tornado usually moves in an easterly direction at a speed of 40-65 kilometers per hour. in...direction = in the direction of... 朝 … 方向 in the opposite direction 朝反方向 in the direction of London 朝倫敦的方向 The aircraft was flying in a westerly direction. Next

30. An average tornado usually moves in an easterly direction at a speed of 40-65 kilometers per hour. An average tornado usually moves in an easterly direction at a speed of 40-65 kilometers per hour. → Normally, a tornado usually strikes eastward/toward the east at a rate of 40 to 65 kilometers an hour.

31. However, speeds of more than 400 kilometers have been recorded. However, speeds of more than 400 kilometers have been recorded. → Nevertheless, some tornados have been measured at a rate of over 400 kilometers per hour.

32. As a tornado tears along, it cuts a narrow path like a knife and completely destroys everything in its way. tear: move somewhere quickly, especially in a dangerous or careless way. A gust of wind tore through the forest. Without looking to left or to right, he tore off down the road. The door flew open, and Jennifer tore into the room.

33. Because tornados are usually not very wide, they may totally destroy all of the houses on one side of a road while leaving those on the other side intact....while leaving those on the other side intact. →...while (they are) causing no damage to the houses on the other side of the road. Back