Unit 2 Saving the earth Topic 2 教案 暑假班2024-2025学年仁爱科普版九年级英语上册

Unit 2 Saving the Earth Topic 2 All these problems are very serious. SA 【单词预习】 音标 单词 汉语 1. [sænd] sand n.沙，沙子 2. ['dezət] desert n.沙漠v.舍弃,遗弃 3. [ɔːl'ðəʊ] although conj.虽然，尽管 4. [rɪˈdjuːs] reduce v.减少；减轻 【课文——1a】 (Kangkang,Maria and Jane are talking in a mom.The wind outside is blowing strongly.) Kangkang:What bad weather!The wind is so strong!And the sand really hurt my face.While I was walking down the street just now,I couldn't see anything. Maria:I'm sorry to hear that.What causes these sandstorms? Jane:People have cut down too many trees.As a result,a lot of rich land has changed into desert. Maria:That's bad.How can that affect the weather? Jane:Trees can stop the wind from blowing the earth away Kangkang:And a lot of water can be saved by forests. Jane:They can also stop the water from washing the earth away Kangkang:Cutting down trees is harmful to human beings,animals and plants.Although we have built“The Green Great Wall”,we still need to do something to protect the environment. 【重点短语归纳】 灭绝, 绝迹 die out 结果 as a result 阻止某人做某事 prevent/stop sb. (from) doing sth. 开始意识到 come to realize/understand 冲走 wash away 人类 human beings 许多; 大量 a (large) number of 尽全力做某事 try/do one's best to do sth. 形成 come into being 处于……的危险中 in danger of … 【重点句归纳】 以前走在街上时，我什么也看不见。 While I was walking down the street, I couldn't see anything. 结果，很多肥沃的土地变成了沙漠。 As a result,a lot of rich land changed into desert. 树木可以防风固土。 Trees can stop the wind from blowing the earth away. 尽管过去有沙尘暴，但现在我们已经建起了“绿色长城”。 Although there were sandstorms before, now we have built“The Green Great Wall”. 【课堂练习】 一、根据语境、音标或所给单词的提示完成句子，每空一词。 1. The wind blew in from the desert /'dezə(r)t/ area and covered everything with sand. 2. The team lost the game, although/though they played well. 3. China has succeeded in reducing (reduce) the use of coal. 4. Sorting garbage can stop the waste from polluting the earth. 5.His teeth were completely(complete) free of pain after seeing the dentist. 二、单项选择。 ( B )1. Tom's clock doesn't work. There must be wrong with it. A. everything B. something C. anything ( A )2. Pandas are cute animals we all like them. A. such; that B. so; that C. too; to ( B )3. After years of hard work, some of China's waste land has forests. A. come into B. changed into C. turned on ( A )4. He hurt his leg yesterday. ,he had to be away from school for two months. A. As a result B. So far C. For example ( A )5. —Where is the small bridge in the village? —The heavy rain last month . A. washed it away B. blew it away C. put it away 三、情景交际。 1.你想号召大家一起尽全力减少空气污染，可以这样说： Let's try/do our best to reduce air pollution. . 2.你想告诉大家树林可以防风固土，可以这样说： Trees can stop the wind from blowing the earth away. . 3.许多动物濒临灭绝，你可以这样告诉同学： Many animals are in danger of dying out. . 【课后练习】 A report said that the hole(洞) in Earth’s ozone layer(臭氧层) is 1 returning to normal.The change will come 35 years after an international agreement to stop using harmful chemicals.A scientist said in the report,“We can see things getting 2 .” The ozone layer is made up of ozone gas. Ozone gas is 3 naturally in the environment.It can protect the planet 4 a type of harmful radiation of the sun. Exposure(暴露) to such radiation is harmful to humans, 5 it has bad effects on plants’ growth. When scientists discovered(发现) a big hole in the ozone layer in the 1980s, they quickly 6 that it was a result of a group of man-made chemicals called chlorofluorocarbons( CFCs). 7 of this kind mainly came from fridges and air conditioners. Then the UN started to make laws(法律) to 8 the industries from producing CFCs. It's reported that since the 1980s, the 9 work of international climate action has helped repair(修补)the ozone layer.Now those 10 have successfully reduced the number of CFCs in the air. And the ozone layer could be fully repaired by 2066. ( A )1. A. slowly B. suddenly C. rapidly ( B )2. A. worse B. better C. less ( C )3. A. performed B. protected C. produced ( B )4. A. with B. from C. for ( C )5. A. or B. but C. and ( B )6. A. changed into B. found out C. built up ( A )7. A. Chemicals B. drugs C. Gases ( C )8. A. stick B. search C. stop ( A )9. A. hard B. easy C. awful ( B )10. A. results B. measures C. effects SB 【单词预习】 音标 单词 汉语 5. [ˈjuːzə] user n.使用者；用户 6. [spæt] spit v.吐，唾 7. [waɪld] wild adj.野的，野生的 8. [ruːd] rude adj.无理的，粗鲁的 9. [bɪˈheɪvɪə] behavior n.行为，举止 10. [sɪtjʊˈeɪʃ(ə)n] situation n.状况;形势;局面 11. [ˈpʌnɪʃ] punish v.处罚,惩罚 12. [pə'hæps] perhaps adv.可能,大概 13. [ˈevrɪbɒdi] everybody pron.人人,每个人 【课文——1a】 Michael:Kangkang,read this article. Kangkang:What's it about? Michael:It's about air pollution in China.It says that China has become the world's largest producer and user of coal.As a result,air pollution has become a serious problem. Kangkang:Yeah.But the government is doing something useful to protect the environment. Michael:That's great.None of us likes pollution. Kangkang:Yes.We shouldn't leave rubbish here and there.Don't spit anywhere in public.Don't walk on grass or pick flowers.Everyone should care for wild animals and plant more trees. Michael:That's right.We should do everything we canto protect the environment. 【课文——2】 Dear Headmaster, I'm writing to tell you _______important.Nobody likes to be untidy.However,some students throw waste paper and bottles _____.We all need a quiet place to study,but some students often make too much noise at school.Worst of all,some of them are quite rude when talking to_ knows their behavior is bad,but____of us knows how to stop them. I think we should make rules to change the situation.__who breaks the rules will be punished.Perhaps it will be hard for us to obey the rules in the beginning,but if ________does his or her best to follow the rules,our school environment will improve. Sincerely, Kangkang 【重点短语归纳】 践踏草坪 walk on grass 到处 here and there 关心, 照顾 care for 最糟糕的是 worst of all 一开始 in the beginning 遵守规则 obey/follow the rules 【重点句归纳】 政府为了保护环境做了一些有意义的事。 The government has done something useful to protect the environment. 我们没有一个人喜欢污染。 None of us likes pollution. 我们应该尽一切努力来保护环境。 We should do everything we can to protect the environment. 【课堂练习】 一、根据语境、音标或所给单词的提示完成句子，每空一词。 1. Though there are so many students in the room, none of them makes any noise. 2. The hotel is still in a good situation /ˌsItʃu'eIʃn/ after the earthquake. 3. You don't look well. Perhaps /pə'hæps/ you should go to see a doctor. 4. The mother punished (punish) her son by not letting him watch TV last night. 5. There are over 1 billion users (use) of the Internet in China. 二、单项选择。 ( C )1. Trees can water and the wind from blowing the earth away. A. produce; prevent B. save; protect C. save; stop ( C )2. Online shops try their best customers’ attention before the Shopping Festival. A. get B. getting C. to get ( B )3. Some kinds of animals like koalas(树袋熊) only live in Australia,so we can find them else in the world. A. somewhere B. nowhere C. everywhere ( C )4. Pointing at others with chopsticks is a very gesture in Chinese culture. A. untidy B. wild C. rude ( A )5. They lost their way in the forest. , they lost their baggage(行李). A. Worst of all B. First of all C. Best of all 三、看图写话。 1. none, like None of them like/likes physics. 2. should, not The girl/She should not pick flowers 3. save, drop People must/should save every drop of water. 【课后练习】 The Sahara Desert is the largest hot desert in the world. It is about 1,800km from the north to the south and about 4,800 km from the east to the west. Temperatures can reach 58℃ in the daytime and fall to -6℃ at night. Over 8,000 years ago, the Sahara was a rich land where food and plants grew well. As the rainfall in the area gradually went down every year, it became a huge desert. Gary Smith and a few of his brave friends decided to hike(远足) across the Sahara.Supporters in cars, who carried food and water for the group,stayed with them together. One day, Smith walked alone and then he couldn't find the rest of the group. Even worse,he could not find out which direction to go. Then a sandstorm covered the area. When the storm was over, Smith was even more worried. In the heat that he couldn't stand,he quickly finished his water.He had to spend that night out in the open,and he almost felt he couldn't survive(生存). The next day, Smith walked on.After the second night,he started to worry about dying. He thought his friends might not find him in time. On the third day, he lost his sense and fell over. When Smith woke up, he was in the car with his friends. He had been found by a group of Bedouin who were traveling in a truck. In such a large desert with the weather conditions, this made it possible for him to survive. Then Bedouin helped Smith return to his group of friends. ( B )1. How did the Sahara turn into a desert according to the text? A. People cut down more and more plants. B. There was less and less rain. C. The temperature was higher and higher. D. There were more and more visitors. ( C )2. Which of the following is the right order according to the text? a. Gary Smith got lost in the desert. b. Gary Smith fell over on the desert. c. There was a sandstorm in the area. d. Gary Smith was saved by some travelers. A. a-d-b-c B. a-d-c-b C. a-c-b-d D. c-b-a-d ( D )3. What does the underlined word“this”in Paragraph 5 refer to? A. Being in this kind of weather. B. Traveling in a truck. C. Returning to a group of friends. D. Being found by Bedouin. ( C )4. Which of the following is TRUE? A. The Sahara has always been a desert. B. Smith still kept a little water till the third day. C. A group of Bedouin found Smith and helped him get back to his friends. D. There is little temperature difference between day and night in the Sahara. ( D )5. What's the writer's purpose of writing the text? A. To encourage people to go through the Sahara. B. To show what the life is like in the Sahara. C. To give some basic information about the Sahara. D. To show surviving in the Sahara can be difficult. SC 【单词预习】 音标 单词 汉语 1. [ˈɒksɪdʒ(ə)n] oxygen n.氧气 2. [həʊl] hole n.洞,坑 3. [reɪdɪˈeɪʃ(ə)n] radiation n.放射，放射物 4. [dɪ'rektli] directly adv.直接地 5. [ˈblæŋkɪt] blanket n.毛毯，毯子 6. [ɪ'skeɪp] escape n.&v.逃跑；逃脱 (from) 7. [reɪz] raise v.上升，上涨 8. [rɪˈfɜː] refer 提到，涉及，有关 【课文——1a】 The earth is 4.6billionyears old.We humans have lived on the earth for only 35000years,but during this period,we have changed our planet a lot in many ways.Somethings we have done are very good for the earth while others are bad. ____All over the world,people have cut down millions of trees.When it rains or when the wind blows,the earth is taken away.Forests have become deserts,so many kinds of animals and plants are disappearing. _____In big cities,cars and buses have polluted the air.Now many people in cities have health problems. ___Factories have also polluted the land and the water.As a result,many rivers and lakes are now dead. _____Around the earth,there's a special kind of oxygen called“ozone”(O3).It is important to the earth.But now air pollution is destroying it and making a very big hole in the ozone layer.Too much harmful radiation from the sun passes through the hole and reaches the earth directly.This is very dangerous because this kind of radiation can cause cancer. _____Carbon dioxide (CO2)in the air has increased a lot.It mainly comes from burning oil,coal and wood.This has formed a blanket around the earth.The heat from the sun can't escape so the temperature is rising.This is called “the greenhouse effect”.It causes the level of the oceans to rise and the climate of the earth to change. All these problems are very serious,so we must do something now. 【重点短语归纳】 在地球上 on the earth 拿走 take away 通过; 穿过 pass through 温室效应 the greenhouse effect 【重点句归纳】 太多来自太阳的有害射线穿过这个洞，直接到达地球。 Too much harmful radiation from the sun passes through the hole and reaches the earth directly. 它在地球周围形成毛毯似的覆盖层。 This has formed a blanket around the earth. 它会导致海平面上升和地球气候变化。 It causes the level of the oceans to rise and the climate of the earth to change. 【课堂练习】 一、用括号内所给单词的适当形式填空，每空一词。 1. In recent years, the sales of new-energy vehicles have risen (rise) rapidly. 2. He put a lid(盖子) on the pot to prevent heat from escaping (escape). 3. The squirrels(松鼠) hide their food in different holes (hole) for winter. 4. Too much traffic not only makes the roads crowded, but also pollutes the air directly (direct). 5. Swimming is one of the best forms (form) of exercise. 二、情景交际。 1.你看到有人在公共场所随地乱吐痰，可以这样劝阻他： Don't spit anywhere in public. . 2.你想告诉对方放射物在很多方面都有害，可以这样说： Radiation is harmful in many ways . 3.朋友在看报纸，你想知道这份报纸的内容，可以这样问他： What's the newspaper about? ? 三、看图写话。 1. sunshine, through The sunshine passes through the window. 2. rise, east The sun rises in the east. 3. be full of, hole The socks are full of holes 【课后练习】 四、熟词生义。(根据语境，选出下列句子中画线词的词性和词义) 1. desert A. n. 沙漠B. vt. 舍弃; 遗弃 B (1) The price rise caused many readers to desert the magazine(杂志). A (2)A man walked alone through the desert. 2. form A. vt. 形成 B. n. 种类; 类型 C. vt. 建立;组成 D. n. 表格 D (1) Here's a form for you to fill in. B (2) Walking is a form of exercise. C (3) He formed a band(乐队) with some friends from school. A (4) We should form a good habit of saving water. 五、句子还原。 March 12 is the Tree Planting Day in China. 1 But do you know how to plant a tree?Here are the steps. Dig(挖) a hole and prepare the tree. 2 At the same time, do some preparations to make sure the tree is ready to be planted. 3 You should finish this job fast so that the roots don't get hit by the sun and won't dry out(干透). If you have dug a perfect hole, the top part of the root ball would be in the same level as the ground. Fill the hole and water the tree. Put the soil back to the hole up to the top of the root ball. 4 Remember not to water it too fast.If there is a need, add more soil just enough to reach the top of the root ball,then water again. Protect the tree. Some work should be done to protect the newly planted tree. For smaller trees, put rocks around the trunk(树干). 5 A. Place the tree in the hole. B. After that, water all the hole area until it is soaked(浸透的). C. On that day, many people plant trees to make the planet greener. D. But you should take the rocks away when the tree becomes strong. E. The hole should be at least 2 to 3 times wider than the root ball(根球) of the tree. 1. C 2. E 3. A 4. B 5. D SD 【单词预习】 音标 单词 汉语 9. [əˈvɒɪd] avoid v.防止,避免 10. [dɪs'kʌvə] discover v.发现,找到 11. ['θɜːsti] thirsty adj.缺水的,渴的 12. [lɔː] law n.法律，法令；定律 【课文——1a】 ( )The sea seems to have the best answer.There is plenty of water in the sea.But we need to take the salt away from the sea water.This is very expensive.If scientists can find cheaper ways to do it,we can solve the problem of the shortage of water ( )How can we avoid a serious water shortage?First,we should save water and not waste it.Second,we should protect our water resources and not pollute them.Third,we should discover ways to reuse water.Scientists have made some progress in this field.Today,some large cities are reusing their water.But people's need for water is increasing day by day.We still don't have enough water.What else can we do? ( )Although the world is hungry,it is even thirstier.While nearly 3/4 of the earth is covered with water,we are still short of drinking water.This is because about 97%of the water on the earth is sea water.So we can't use it for watering plants or drinking directly.Humans can only drink and use fresh water from places including rivers,lakes and underground. 【重点短语归纳】 似乎做……… seem to do ... 大量水 plenty of water 避免(做)某事 avoid (doing) sth. 节约用水 save water 一天天地 day by day 被······覆盖 be covered with . .. 缺乏……… be short of …… 【重点句归纳】 如果科学家们能找到更便宜的方法去完成它(淡化海水)，我们就能解决缺水的问题。 If scientists can find cheaper ways to do it,we can solve the problem of the shortage of water. 我们怎样才能避免严重缺水的问题呢? How can we avoid a serious water shortage? 虽然地球几乎有四分之三的面积被水覆盖，但我们仍然缺乏饮用水。 While nearly 3/4 of the earth is covered with water, we are still short of drinking water. 【课堂练习】 一、根据语境、音标或所给单词的提示完成句子，每空一词。 1. The number of people in high-tech(高科技) industries has increased by nearly (near) 50,000 over the past five years. 2. We can be a greener person by reusing (reuse) things like water and bags. 3. The man felt quite thirsty (thirst) after a long walk in the hot sun. 4. Some young people volunteer to teach in village schools to solve the teacher shortage (short) problem. 5. Scientists are trying their best to discover (cover) the cause of the disease. 二、单项选择。 ( A )1. The government has passed some against food waste. A. laws B. resources C. methods ( B )2.After years of hard work, the girl rose from being a to become a superstar. A. everybody B. nobody C. somebody ( B )3. The driver made an immediate left turn to avoid the dog. A. hit B. hitting C. to hit ( B )4. —Have you got any tickets to the concert? —I tried to, but I found . A. one B. none C. anything ( C )5. We can boxes for storing(收纳) things. A. reduce B. increase C. reuse 三、从 nobody, somewhere, something, somebody, anything 中选择恰当的词填空。(每词限用一次) It was snowing hard. 1. Nobody would like to be out in the street on such a cold day.Suddenly Linda heard a noise outside, but Ben didn't hear 2. anything . He thought there must be 3. something wrong with her ears,so they went to the window to check things out. They saw 4. somebody standing under the tree. Soon the man was gone and went 5. somewhere else. 【课后练习】 五、重点句子翻译。 1.当我走在街上的时候，我什么也看不见。 While I was walking down the street,I couldn't see anything. 2.人们砍伐了如此多的树木，以致这块土地变成了沙漠。 People have cut down such a large number of trees that the land has changed into desert. 3.我们应该尽一切努力保护环境。 We should do everything we can to protect the environment 4.我们所做的一些事情对地球是非常好的，而另一些是坏的。 Some things we have done are very good for the earth while others are bad 5.每个人都应该关爱野生动物并多种树。 Everyone should care for wild animals and plant more trees. 6.我们没人喜欢污染。 None of us likes pollution 六、短文填空，每空一词。 Traditional Chinese Medicine ( TCM) is used to help people keep the balance(平衡) of yin and yang. But have you ever 1 (imagine) that one day you can learn herb(药草) planting and TCM courses at school? 2 primary school in Nanjing has just opened a herb farm.More than 30 herbs are planted.Students there are guided by doctors from a TCM hospital to tell different herbs and learn plant development,medicinal value as well as 3 (grow) herbs. The hospital has also donated(捐赠) over 100 cartoon books about TCM to help draw students’ attention to herbal medicine. Another middle school has introduced(引进) TCM courses to students of all 4 (grade).These courses cover a basic knowledge of herbs,herb planting 5 cooking with herbs.They give students a better understanding of TCM, bringing out the sense of pride in Chinese traditions and the country's rich and 6 (color) culture. Also in Shanghai, Tongji University has provided foreign(外国的) students 7 some chances to plant different kinds of herbs widely used in Chinese medicine and cooking. By taking care of the plants, foreign students can 8 (usual) get first-hand experience of making herbal medicine from start to finish, and spread TCM culture to 9 (they) own countries. Learning the herb planting courses at schools across China 10 (get) students close to TCM and helps pass on the tradition. 1. imagined 2. A 3. growing 4. grades 5. and 6. colorful 7. with 8. usually 9. their 10. gets 1 学科网（北京）股份有限公司 $$