unit5thepowerofnature

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unit 5 the power of nature

教材分析

本单元以the power of nature 为话题，旨在通过单元教学使学生了解火山爆发、地震、台风、洪水等自然现象，认识到自然的伟大力量，并会用所学词汇描述在经历自然灾害时的感受，思考人类应对自然灾害的态度和方法，提高自我保护意识。

????1.1 warming up通过对火山爆发示意图的讨论激活学生了解与本单元话题相关的背景知识，而后通过讨论人类应对自然灾害的措施引发学生对本单元话题的思考，激发学生的求知欲，为随后进行的听、说、读、写打下基础。??

????1.2 pre-reading通过回答问题测试自己是否适合作火山学家，让学生了解这一陌生职业，为阅读做好准备。

????1.3 reading部分一位火山学家以第一人称的形式讲述了自己的工作及第一次目睹火山爆发时的情景和心情，描写了人与自然的斗争与和谐相处的乐趣，使学生认识到火山是美丽的，但同时极具破坏力，而火山学家的工作可以减少由火山引发的损失。

????1.4 comprehending设计了两种题型：第一题要求学生在阅读后回答相关问题；第二题检测学生对文章细节的理解。

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教材重组

将warming up, pre-reading, reading 及comprehending 组合在一起，上一节阅读课。

课时教案

the first period reading

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, evaluate, 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 evaluated 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 th 内容过长，仅展示头部和尾部部分文字预览，全文请查看图片预览。 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 expressions on page 35. these exercises will help you practice the words and expressions we’ve just learned. the second one is to retell the text. that’s all for today. see you tomorrow.

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