人教版高二英语选修6 Unit 5 The power of nature单元教案

Unit 5 The power of nature

The First Period Warming up and Reading (1)

Teaching goals  教学目标

1. Target language  目标语言

a. 重点词汇和短语

volcano, erupt, compare with, hurricane, adventure, bored, excite, uate, unfortunately, burn to the ground, eruption, fountain, absolutely, fantastic, made one’s way, potential, impressive

b. 重点句式 P34

1. Having collected and uated the information, I help other scientists to predict where lava from the volcano will flow next and how fast. P34

2. I was about to go back to sleep when suddenly my bedroom became as bright as day. P34

3. However, the most important thing about my job is that I help protect ordinary people from one of the most powerful natural forces on earth — the volcano. P34

2. Ability goals 能力目标

Enable the students to learn about the powerful natural force — volcano and the work of an volcanologist.

3. Learning ability goals 学能目标

Help the students learn how to analyze the way the writer describes his exciting job.

Teaching important points 教学重点

Read the text and answer the questions in Comprehending Exercise 2.

Teaching difficult points 教学难点

Retell the writer’s first sight of Mount Kilauea eruption.

Teaching methods 教学方法

Discussion, reading, speaking and cooperative learning.

Teaching aids 教具准备

A projector and some slides.

Teaching procedures && ways  教学过程与方式

 

Step ⅠWarming Up

Lead the students to the topic by telling them a story. Then get the students to describe a volcano eruption according to the diagram. After they are familiar with the topic, let them list some other powerful natural forces and discuss the ways human beings protect themselves from the natural forces.

T: Listen to me carefully. I will tell you a story about a strange city. The strange city named Pompeii is a dead city. No one has lived there for nearly two thousand years, yet every year thousands of people travel from distant countries to visit it. It died suddenly in a terrible rain of fire and ash. Tons of hot ash fell on Pompeii, hiding it from sight. For three days the sun didn’t break through the clouds of ash in the sky. Then the whole city shook and buildings fell down. When everything was calm, Pompeii was buried deep. A city disappeared and people there lost their lives too. Can you guess what had happened to the city?

S1: There must have been a terrible earthquake. After the terrible quake, everything was destroyed.

T: Yes. It’s one kind of the causes. Any different ideas?

S2: Maybe a volcano erupted and a terrible rain of fire and ash fell on the city.

T: You got it! Mount Vesuvius, which had slept quietly for centuries, erupted suddenly. It destroyed the city Pompeii. How terrible! Have you ever seen a volcano erupting? Please turn to page 33. Look at the diagram. Describe a volcano erupting using the diagram and the given words.

S3: When boiling rock erupts from the volcano, the red hot lava rushes hundreds of metres into the air and a cloud of ash goes straight up into the air. Ash cloud forms. Rocks, fire, ash fall onto the ground. The lava flows slowly down the mountain. It buries everything in its path under the molten rock.

S4: Sometimes, volcano erupting can cause some other disasters like earthquakes, fire and ground sea.

T: How powerful the nature is! The lava can buries everything in its path. A volcano erupting can damage a city. A flood can carry everything in its path, while a fire will damage everything it meets. It seems that we human beings are powerless in front of these natural forces. What can we do to protect ourselves from powerful natural forces? Please work in groups of four to list some other natural forces and discuss the ways that human beings protect ourselves.

A few minutes later.

T: Who would like to share your opinion with the class?

S5: I’d like to talk about volcano. Sometimes, the volcano gives warnings in the form of many small earthquakes. And scientists can provide warnings of possible volcano explosions with the help of equipment. So the government can help people who live near the volcano leave their homes before erupting.

S6: We are more familiar with fire. In fact, it can be avoided most of the time, if we are careful in our daily life. I know a way of controlling the fire. Firefighters burn the trees which are in the path of the fire, so there is nothing to burn when the fire arrives.

S7: Flood always happens in the south of our country. Predication is very important. Scientist keep observing the level of the water during the summer. People strengthen the bank and move to higher land.

 

S8: We have learned more about earthquakes. People have learned many ways to protect themselves. For example, earthquake happens, if you are in bed, stay where you are and protect your head with a pillow. If you are outdoors, find a clear spot away from buildings, trees and streetlights.

S9: I think the best way is to move to a safer place where fire, earthquake, flood and hurricane will never happen.

 

Step Ⅱ Pre-reading

Get the students to answer the six questions on page 33 to find out whether they will enjoy working as a volcanologist. And then get them to talk about the occupation according to the questions.

T: I see. Prediction is very important. We can say scientists play an important part in protecting people from natural forces. Would you like to study volcanoes? And do you want to be a volcanologist?

Ss: Yes.

T: Let’s test whether you are suitable for this job or not. Answer “yes” or “no” to these questions on page 33.

The students answer the questions to see if they are suitable to be a volcanologist.

T: Are you suitable for the job? Who can tell us what kind of person can be a volcanologist?

S1: First he must be brave enough because he must climb into a live volcano to take the temperature of the boiling rock inside.

S2: I think interest is the most important. He should show great interest in studying rocks and volcanoes.

S3: He should be interested in travelling to unusual places and like adventure in his life.

S4: If you want to be a volcanologist, you should enjoy working outside because a lot of work need to be done outdoors.

 

Step Ⅲ While-reading

Scanning

Get the students to read the passage quickly and accurately. Give them a couple of minutes to look through the whole passage. Tell them to read the text silently and then ask them some detailed questions about the text.

T: What does a volcanologist do? Is the work interesting? Let’s read a passage written by a volcanologist. The volcanologist enjoys his job very much. He described his exciting job. And he wrote down his first sight of an eruption. Now let’s read the text quickly and find out the answers to these questions Comprehending Exercise 1 on page 35 .

Several minutes later.

Check the answer..

 

Skimming

In this part, the students will read the text quickly to get the general idea of the passage. Check the answers with the whole class, then explain some sentences or words that the students may find hard to understand.

T: Now please read the text again and try to get the main idea of the passage in groups of four.

Three or four minutes later.

T: Have you got the general idea of the text?

It wasn’t very easy to walk in these clothes, and we slowly made our way to the edge of the crater and looked down into the red, boiling center. Though I was a little afraid, I wanted to climb down into the crater to collect some lava. But this being my first experience, I could only stayed at the top and watched the two scientists. At that time I determined to be a volcanologist forever.

Discussion

T: In the writer’s opinion, his job is the greatest one. Do you like this occupation? Why or why not? Discuss in groups of four.

S2: I would not like to be a volcanologist. I prefer to work in an office to do some research work. It’s a waste of time and energy to spend so much time traveling.

S3: I hope to be a vocanologist. You’ll be proud of yourself when people escape before volcano erupting because of your work. Also, I am interested in the rocks and other things that make up the surface of the earth. I want to know the secret of the earth.

S4: It is not my ideal occupation. I like traveling to unusual places, studying different cultures, talking with interesting people and collecting interesting things. But I’m not brave enough to climb into a live volcano to take the temperature of the boiling rock inside.

S5: I don’t like this job. It’s too dangerous. If the volcano erupts suddenly when you are collecting the lava, maybe you will lose your life.

T: Well, if you meet the writer, what kind of questions would you ask him?

S6: Aren’t you afraid when you walk towards the volcano? It’s so hot and the volcano may erupt again.

S7: What should you do if you get lost on your way to the volcano?

S8: When did you begin to be interested in volcanoes?

S9: How will you escape if the volcano erupts suddenly?

S10: Are there any living things in volcanoes?

S11: Why do people live near the volcanoes since they may lose their homes or even lives?

Writing characteristics

T: Good! If you are interested in this occupation, you can get more information on the Internet. Now who can summarize the writing style and techniques of this text?

The teacher can ask the students to have a discussion in pairs or groups, and then ask some of them to show their ideas.

Sample answers:

This passage was written by a volcanologist. He uses the first person to describe his exciting job and his experience and express his true love for his job. The words are vivid and the description is natural, which makes the readers feel as if they were watching the volcano eruption and begin to like the occupation. For example, he uses “like a railway train passing outside my window”, “suddenly my bedroom became as bright as day” and “red hot lava was fountaining hundreds of metres into the sky” to describe the big noise and fantastic sight of volcano eruption. To tell readers that his job is interesting, the writer uses several “sometimes”, which makes the readers feel the job is extremely interesting and want to be a vocanologist. The writer talks about the volcano objectively. He points out the damages of volcano but he praises its fantastic sight at the same time.

T: What can we learn from the text?

S: The key word of the text is “exciting”, which is the focus of the passage. By telling the readers his everyday work, the importance of his job, his first sight of volcano eruption and his sincere love for his job, the author proves it’s his chief enjoyment to be a volcanologist. And I appreciate the writer’s attitude towards nature. We should love nature and we can do something to minimize the damage caused by natural forces.

 

Step Ⅴ Homework

T: Now it’s time for homework. Today you have two tasks to finish after class. The first task is to finish exercises in Discovering useful words and expression_r_rs on page 35. These exercises will help you practice the words and expression_r_rs we’ve just learned. The second one is to retell the text. That’s all for today. See you tomorrow.

The 2nd Period  Rading(2)—language points and comprehending

Teaching Aims

1.       To learn some new words and phrases.

2.       To learn some complicated sentence patterns.

Teaching Important Point

How to help the students to master the usage of some useful words, expression_r_rs and sentences.

Teaching Difficult Point

How to enable the students to grasp and remember the detailed information of the reading material.

Teaching Procedure

Step1 Revision

1. Check the answers to Ex. 1 on page 35.

2. Check the answers to Ex. 2 on page 36.

1．The eruption of Mount Vesuvius in 79AD took people in Pompeii by surprise. It was so quick and so severe that the town was soon covered in _____ and ______. Many houses in the town were __________________. It was an ________ disaster for many people who could not get away in time. A writer named Pliny, who was there during the ________, described how lava was thrown into the air like a ________. ______________ many of the townspeople, _________at the _________ sight of Vesuvius eruption, stayed too long and failed to escape in time.

Keys: 1. bored; 2. volcano 3. made my way 4. compare with

5. erupt 6.impressive

2．The eruption of Mount Vesuvius in 79AD took people in Pompeii by surprise. It was so quick and so severe that the town was soon covered in _____ and ______. Many houses in the town were __________________. It was an ________ disaster for many people who could not get away in time. A writer named Pliny, who was there during the ________, described how lava was thrown into the air like a ________. ______________ many of the townspeople, _________at the _________ sight of Vesuvius eruption, stayed too long and failed to escape in time.

Keys: ash; lava; burnt to the ground; absolute; eruption

Fountain; Unfortunately; amazed; fantastic

Step 2 Language Points

1．volcano n.

pl. volcanoes

an active volcano    活火山

an extinct volcano  死火山

a dormant volcano休眠火山

知识拓展

火山学     volcanology  -logy: “…… 学/论。”

          oceanology   climatology

火山学家  volcanologist      -ist “……学家 ”

            pianist    physicist

2. Have you ever considered how weak humans are compared with a volcano, hurricane or earthquake?

consider大致有两种含义。含义不同，用法有别。

知识拓展

①consider作“考虑”解，常用于以下句型：

consider+名词/代词/动名词

consider+从句或“疑问词+不定式”。

You’d better__________________________.

你最好考虑我的建议。

I’m _________________abroad some day.

我一直考虑有一天出国。

Have you considered_________________?

你们考虑他的建议了吗？

We must consider________________.

我们必须考虑下一步要做什么。

Keys:

consider my suggestion     considering going   what he suggested;  what to do next

②consider作“认为”解时，常用于以下句型：

consider sb. /sth+ (as) +形容词/名词   其中，as可以省略。

consider +sb./sth.+不定式 其中，不定式通常是to be (可以省略) 或其他动词的完成式。

consider +it+形容词/名词+不定式短语

consider+宾语从句

At first they considered me___________________.

起初他们认为我是医生。

We consider this matter________________________________.我们认为这件事很重要。

We all consider him _______________the bike.我们都认为他偷了自行车。

We________________________________________.

我们认为学好英语很难。

I consider____________________________________________.  我认为帮助你学习英语是我的职责。

We________________________________________________. 我们这首音乐很值得一听。

Keys:

(as) a doctor   (to be) very important   to have stolen

consider it hard to learn English well    it my duty to help you with your studies      consider that the music is well worth listening to

3. Sometimes working indoors…, I’m never bored.

bore vt 使(人)厌烦

---I am sorry I spoke for so long

---I hope I didn’t bore you.

bored adj. (人) 厌烦的

boring adj. （物）令人厌烦的

Are you getting bored of doing the same thing everyday?
The movie was so boring that I fell asleep

The life is more and more boring, so many people become more and more bored.
生活越来越无聊,所以很多人也变得越来越无聊

4. Many houses have been covered with lava or burnt to the ground.

burn to the ground (楼房等)完全烧毁

他无处栖身因为他的房子被烧掉了.

He has no place to live in because his house has been burnt to the ground.

知识拓展

burn up   烧完; 烧尽; 烧光;烧旺起来

burn down烧成平地(烧毁,烧光)
burn off烧掉

burn out烧掉

Don't leave the gas on you might burn the house down.

别忘了关煤气炉--不然会把房子烧掉的.

The house burnt down in half an hour.

那所房子在半小时之内就被焚为平地.

All the wood has been burnt up.

木柴全部烧光了。

burn off  烧掉

Burn the old paint off before re-painting the door.

先把门上的旧漆烧掉再上新漆.

burn out      烧掉

The hotel was completely burnt out.

该旅馆毁於大火.

If he doesn't stop working so hard, he'll burn himself out.

他继续这样拚命地工作，就会累垮的。

5. We slowly made our way to the edge of the crater.

make one’s way （向某地）走（去）

make one's way in life 事业有所成就

make way (for) 让路，让位

He made his way through the crowd to greet us.

他穿过人群向我们打招呼。

All the traffic has to make way for a fire engine. 所有的车辆都得给救火车让道。

If you want to make your way in the world, you must learn to work hard

while you are still young. 你若想要有

出息，趁年轻的时候要学会发奋。

知识拓展

feel one’ way摸索前进

push one’s way挤过

find one’s way找到路，设法到达

go one’s way走自己的路，我行我素

fight one’s way奋勇前进

wind one’s /its way蜿蜒前进

lose one’s way迷路

6. Today, I am just as enthusiastic about my job as the day I first started.

be enthusiastic (about) 感兴趣的，热心的

He is enthusiastic about helping others .他热心助人。
I'm really very enthusiastic about it.我对此真的非常热心。

Despite all our efforts we still lost the game.

7. She made an effort to be nice to her boss.

effort n. 努力; 力气; 努力的成果

make an effort to do sth  努力做某事：

It took a lot effort to lift the boxes.

抬起那些箱子要花很大的力气。

Despite all our efforts we still lost the game.

尽管我们尽了全力，我们还是输掉了比赛。

Put more effort into your work.

你要更加努力地工作。

Your success lies upon your effort.

你成功与否取决于你的努力。

He made an effort to arrive on time

他尽量准时到达。

8. Having collected and uated the information, I help other scientists to predict where lava from the volcano will flow next and how fast it will flow.

本句为–ing形式的完成式作状语。如果分词表示的动作在谓语动词表示的动作之前发生，该分词用完成式。 例如：　　　　　　

Not having met the man before, I couldn't recognize him at first.
Having finished my homework, I went to play football.

______ the programme, they have to stay there for another two weeks. (C)

A.      Not completing       B. Not completed

C. Not having completed D. Having not completed

Step 3 Homework

1. Master and go over the use of the words and phrases above.

2. Pre-view the usage of –ing form.