Unit 4 Topic 2 Section C 课件2024-2025学年仁爱科普版英语九年级上册

Unit 4 Amazing Science Topic 2 Section C Teaching aims 1.Knowledge aims： Words and phrases: Words and phrases: storm, weigh, journey, excitement, generally, limit, be named after sb., as…as…, at a distance of …, It takes…to do sth. Sentences: Its diameter is 53% as wide as that of the earth. You can tell which planet is Mars because it is bright, red in the night sky. The gravity on the surface of Mars is about two-fifths as strong as it is on earth. It takes a spaceship about eight months to reach Mars from the earth It has been two days since we landed on Mars. 2. Skill aims: Let students use the future passive voice in listening, speaking and writing. 3. Key points: Grammar: the Future Passive Voice 4. Difficult points： Its diameter is 53% as wide as that of the earth. It has been two days since we landed on Mars. New words and expressions solar system 太阳系 Roman adj. 古罗马的，古罗马帝国的 god n. 上帝；神 diameter n. 直径 storm n. 风暴，暴（风）雨 gravity n. 重力；引力 weigh v. 重，有……重 generally adv. 一般地，通常 journey n. （尤指长途）旅行 limit v. 限制，限定 n. 限度；限制 excitement n. 激动；令人激动的事 What do you know about Mars? solar system [`səulə `sistəm] 太阳系 Which one is Mars ? Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Mars is the_____ planet from the sun in our solar system. fourth Mars is is named after Mars, the Roman god of war. the Roman god of war be named after 以……而命名 The solar system Mars goes around the sun at a distance of about 228 million kilometers. ↑ 228,000,000 km ……相隔…… Fast Reading 1. Mars looks like a red ball. ( ) 2. The temperature on Mars is very high. ( ) 3. Mars is much larger than the earth. ( ) 4. Mars is too far away for us to reach. ( ) T F F F 1a Look at the pictures and predict which statements are true about Mars. Then read and check. Mars What’s the type of the passage? A. Exposition (说明文) B. Narration （记叙文） C. Argumentation（议论文） What’s the title of the passage? Scanning-Read and match the main idea of each paragraph. Para.1 Para.2 Para.3 Describe what Mars looks like Ask what Mars looks like Search for more information about Mars in the future. 搜索 What do you know about Mars? What does it look like? Mars is the fourth planet from the sun in our solar system and is named after Mars, the Roman god of war. Its diameter is 53% as wide as that of the earth. Mars goes around the sun at a distance of about 228 million kilometers. You can tell which planet is Mars because it is bright red in the night sky. It looks like a red and orange ball. It's very beautiful. But during spring and summer, the surface of Mars is covered by strong storms. as ... as...意为“和......一样”，中间接形容词或副词的原级。 否定式为not as ... as ...， 意为“不如......那样......” The gravity on the surface of Mars is about two-fifths as strong as it is on earth. So a person who weighs 90 kilos on earth weighs only 36 kilos on Mars. The temperature on Mars is between -138℃ and 28℃. The air has only 0.13% oxygen. It takes a spaceship about eight months to reach Mars from the earth when the two planets are closest to each other. Scientists are still searching for more information about Mars. Diameter Color Shape Climate Gravity Distance from the sun 53% as wide as that of the earth red and orange a ball during spring and summer: strong storms temperature: between -138℃and 28℃ about two-fifths as strong as it is on earth about 228 million kilometers 1b Read 1a again and write down the information about Mars. 1. Read 1a carefully and write down the key phrases about Mars. 2. Watch a short video and get more information about Mars. Language points 1. Mars is the fourth planet from the sun in our solar system and is named after Mars. 火星是太阳系中离太阳第四远的行星，以火星命名。 name（动词），意为“命名，给......取名”，后接双宾语，构成： name sb./sth. +名称。 e.g. They named their son Bruce. name ... after 以……的名字给……取名 be named after 是被动语态 e.g. We named China’s first lunar probe after Chang’e. e.g. The baby was named after Bruce Lee. 这个婴儿的名字是以李小龙的名字取的。 2. Its diameter is 53% as wide as that of the earth. 它的直径是地球直径的53%。 倍数的表示法： A+be+倍数+as+adj./adv.原级+as+B A+be+倍数+adj./adv.比较级+than+B e.g. This box is five times as heavy as that one. 这个盒子是那个盒子的四倍重。 My house is three times as big as his. 我家是他家的三倍大。 e.g. Its diameter is 53% as wide as that of the earth. = Its diameter is 53% wider than that of the earth. 3. Mars goes around the sun at a distance of about 228 million kilometers. 火星在距太阳约 228 000 000千米处环绕着太阳转。 go around 转动 at a distance of 相隔… distance（可数名词），意为“距离” distant（形容词），意为“遥远的” at a distance of意为“相隔”；at a distance意为“在远处” in the distance 在远处 e.g. That is Long Island in the distance over there. 那边远处是长岛。 e.g. The moon goes around the earth at a distance of 380 000 km. 月球在距地球38万千米的地方绕地球旋转。 4. You can tell which planet is Mars because it is bright red in the night sky. 你可以分辨出哪颗行星是火星，因为它在夜空中是明亮的红色。 tell在这里为“辨别，区别，认出”，常和can, could, be able to连用。 e.g. It was so dark that I couldn’t tell it was you. 天太暗了，我没有认出是你。 cover ... with ... 意为“把......用......盖住” e.g. Ann covered her face with her hands. be covered with = be covered by “被......覆盖着” e.g. The ground is covered with/by thick leaves. ② cover（可数名词），“封皮，封面” But during spring and summer, the surface of Mars is covered by strong storms. 火星表面被强烈的风暴覆盖着。 Language Points 6. weigh（及物动词），意为“重，有多重” e.g. The large stone weighs over 10 tons. weight（不可数名词），意为“重量；分量” e.g. What’s your weight？ = How much do you weight？ So a person who weighs 90 kilos on earth weighs only 36 kilos on Mars. While – reading : Say them in Chinese. 4. It takes a spaceship about 8 months to reach Mars from the earth. 乘宇宙飞船从地球到火星要花8个月 It takes sb. +时间 + to do…花费某人时间做某事 6. Scientists are still searching for more information about Mars. 科学家们正在对火星进行更多的探索。 search for 寻找，搜索 e.g. All night they searched for the lost boy. 整个晚上他们都在搜寻那个丢失的男孩。 search… for… 寻找，搜索（强调有具体的目标） e.g. She searched many shops for Jim’s gift. 为了送给Jim礼物，她搜索了很多店。 search 在……搜查；搜身。是个及物动词，后面直接跟 “被搜查的对象”。 e.g. Mr. Smith searched every room in the house. 史密斯先生搜索了房子里的每个房间。 Language Points 12. It is (has been) + 一段时间 + since。 e.g. It is a long time since they left. = It has been a long time since they left. 8. worth（形容词），意为“值得，有......价值的”，常用短语有： ① be worth doing sth. 意为“值得做某事” e.g. The place is worth visiting. ② be worth +钱 意为“值多少钱” e.g. The picture is worth 30￥. ③ be worth +名词 意为“值得......” e.g. I don’t think it’s worth our work. 2. Kangkang’s uncle sent an e-mail to him from Mars. Choose the right words to complete the letter. Hi Kangkang, It has been two days_________( since ,from) we landed on Mars. It _________(cost, took) us more than two years to_________ (reach, get) here. Generally, the journey went well, but the living conditions were_______( quiet, quite) bad during the journey. We had to produce most of the food in the spaceship. ______________(What’s more, What’s worse), our water supplies were very low. We had to limit the use of water during _________(those, these) days. So we had a shower every six weeks. We will spend another seven hundred and sixty-three days on Mars. __________( How, What )a long time! I often miss the family, but the excitement of being on Mars is worth it! Wish me luck! Yours, Uncle Stephen since took get quite What’s worse those What Read 2 and answer the questions. (1) Who is this e-mail from and to? It is from Uncle Stephen to Kangkang. (2) How long did it take them to get there? More than two years. (3) Did everything go well during the journey? No, it didn’t. 3a. Write back an e-mail to Uncle Stephen for Kangkang and ask him for more information about Mars. The list may help you. clothing food and drinks weather transportation … 3b Work in pairs. Check your partner’s e-mail and use your knowledge of Mars to answer the questions for Uncle Stephen. Dear Uncle, I’m very glad to receive your e-mail, and I know that the living conditions were quite bad during your journey. I am interested in the information about Mars. Can you tell me more about it ? How about the weather on Mars? Is it very cold? What kind of transportation do you use there? I am looking forward to your e-mail! Good luck! Yours, Kangkang Revision in class 1.太……以致于不能…… 2.看起来像 3.以……命名 4.和……一样…… 5.围绕……转 6.相隔……远的地方 7.被覆盖…… 8.做某事花费某人一段时间 9.离……近 10.寻找 11.更糟的是 12.值得(做)某事 13.自从...有多久 1.too...to... 2.look like 3.be named after 4.as+adj./adv.+as... 5.go/move/travel around... 6.at a distance of... 7.be covered by/with... 8.It takes sb.some time to do sth. 9.be close to... 10.search for 11.what's worse=even worse 12.be worth(doing)sth. 13.It is (has been) + 一段时间 + since Revision in class 1. The moon goes around the earth ______ a distance of about 380,000 kilometers. A. is B. for C. with D. at 2. It ______ a long time since we reached Beijing. A. are B. was C. has been D. had been 3. —Don’t throw about your newspaper! —Sorry, I’m busy now. They will _____ later. A. collect B.be collect C.be collected D. collected 4. It ______ me three hours to finish the work. A. spends B. takes C. costs D. pays 5. Many trees and flowers _____ in our school last year and they made our school a beautiful garden. A. have planted B. are planted C. were planted D. will be planted 6. ----Is Mars bigger than earth?----No. It’s about ______the earth. A.as big as B.as bigger as C.the same big as D.a quarter as big as 7. My best friend was late for class.______ ,she left her bag at home. A.What’s more B.However C.What’s worse D.Even though 8. The famous painting was named______Autumn. A.to B.as C.for D.after D C C B C D C D We learn: 1. Some words: storm, weigh, journey 2. Some phrases: name after, as …as, at a distance of, search for 3. Some sentences: (1) Its diameter is 53% as wide as that of the earth. (2) It has been two days since we landed on Mars. We can : 1. Talk about something more about Mars. 2. Write back an e-mail. Summary Thank You 93571.93 $$