Unit 5 课时5 Lesson 5（课件）英语新教材冀教版八年级下册

Unit 5 Great inventions Lesson 5 Refrigerator timeline 1. Lead in 2. New lesson 5. Summary 3. Language points 4. Exercise 6. Homework Contents 学习目标 能够从发明的时间线中找出关键节点信息（如时间、人物/发明者、事件与变化），完成理解任务，并用时间顺序梳理“发明-改进-普及”的发展脉络，形成对技术演变的整体认识； 01 能够在语境中理解并运用与发明史相关的表达，用简单句表达发明带来的变化与价值（如功能、普及、节能等影响），提高信息表达的准确性与条理性； 02 能够小组协作选择一种发明，通过查阅资料筛选信息，制作出结构清晰、图文结合的时间线作品，并进行口头介绍与分享，做到表达清楚、突出重点，还能对同伴的作品做出简单反馈。 03 通过本节课学习，学生能够： Lead in The refrigerator is very important in our daily life. /rɪ＇frɪdʒəreɪtə/=(fridge) 冰箱 New Lesson Read the timeline and tick the inventor of the first refrigerator. □ William Cullen □ Oliver Evans □ Fred.W.Wolf ✔ Read the timeline again and circle the correct answers. A When did refrigerators become popular in some countries? a.In the 1920s b.In the 1800s. c.in the 1980s B What was true about using refrigerators in the 1990s? a.A refrigerator was considered a luxury item. b.The running cost of a refrigerator is so high that no one could afford one. c.Energy-efficient refrigerators had become the new normal √ √ Language points 1. Ancient China, Greece, and Rome used ice or snow to preserve food by freezing or chilling it，古代中国、希腊和罗马用冰或雪通过冷冻或冷藏来保存食物。 过去式为froze;过去分词为frozen freeze /friːz/ v.（使）冻结；结冰 既可作及物动词，又可作不及物动词。 Water freezes at 0°C.水在O摄氏度时结冰。（不及物动词） The cold weather froze the ground.寒冷的天气使地面都冻硬了。（及物动词） 拓展(1)freeze作动词的其他含义及用法： 停住不动；呆住 I froze and listened; someone was in myapartment.我僵在原地仔细听：有人在我的公寓里。 I froze with horror as the door slowlyopened.门慢慢开启时我吓呆了。 冻结（资金、银行账户等） The court froze their assets.法院冻结了他们的资产。 (2)frozen[形容词]冷冻的；冷藏的；冻僵，极冷 ·You can use fresh or frozen fish.你可以使用新鲜或冷冻的鱼。 My hands are frozen.我的手冻僵了。 2 Refrigerators became more energy-saving.冰箱变得更加节能。 energy /ˈenədʒi/ n. 能量；能源 作不可数名词。 能源 Using local clean energy plays an important rolein Xiongan New Area' s progress.利用本地清洁能源在雄安新区的发展进程中发挥着重要作用。 能量 Try to be bathed in sunshine on sunnymornings——sunlight gives you energy for the day!试着在晴朗的早晨沐浴在阳光里———阳光会为你的一天提供能量！ (2) energetic[形容词]精力充沛的；充满活力的 I enjoy jogging in the morning because it helps me stay energetic throughout the day。我喜欢在早上慢跑，因为这能让我一整天都保持精力充沛。 Exercise Work in pairs Make a timeline for an invention. Hello everyone. Today I'd like to introduce an invention that has changed our lives a lot - the phone. First,in 1876,the telephone was invented by Alexander Graham Bell.For the first time, people could talk to someone far away without being face to face. Then in 1878, Thomas Edison improved the telephone, so voices became clearer and the telephone was easier to use. Next,the phone became mobile.In 1973,the first mobile phone call was made by Martin Cooper from Motorola.This was a big step forward because people could communicate while moving. Later,in 1992,the first text message was sent by Neil Papworth.After that,people could send quick messages instead of making a call every time. In 2007,the smartphone was introduced by Apple,and Steve Jobs played an important role in this change,Phones were not only for calling anymore.We could take photos,listen to music,and go online. Since the 2010s,apps and mobile internet have been widely used,so phones have become a daily tool for studying, shopping, and even paying. In my opinion,the phone is one of the greatest inventions.It helps us stay connected and makes our lives more convenient.Thank you for listening. Summary ①ancient/'eɪnʃənt/ adj.古代的；古老的 ②preserve/prɪ'zɜːv/ v.保存 ③freeze/friːz/ v.（使）冻结；结冰 【拓】frozen/'frəʊzn/ adj.冷冻的，冷藏的 ④chill/tʃɪl/ v.（使）冷却；（被）冷藏 ⑤experiment/ɪk'sperɪmənt/ n.实验；试验 do an experiment做实验 ⑥artificial/ˌɑːtɪ'fɪʃl/ adj.人工的，人造的 ⑦refrigerator/rɪ'frɪdʒəreɪtə(r)/ n.（=fridge）冰箱 ⑧compartment /kəm'pɑːtmənt/ n.（家具或设备等的）分隔间，隔层 ⑨energy-saving节能的 energy /'enədʒi/ n. 能量；能源 【拓】energetic/ˌenə'dʒetɪk/ adj.精力充沛的，充满活力的 ⑩concisely /kən'saɪsli/ adv.简明地；简练地 【拓】clearly and concisely言简意赅 Homework THANK YOU WATCHING THIS ONE 基础作业：为你喜欢的一个发明制作时间线。 拓展作业：通过时间线为全班同学介绍这一伟大发明。 Homework Thank you for listening! Lavf57.71.100 Packed by Bilibili XCoder v2.0.2 $It's on . some time. What if our refrigerators . disappear? Oh, no problem. I will cool everything using my super powers . on some. Firstly, if refrigerated disappeared, ice cream lovers all around the world will be extremely unhappy. Secondly. if refrigerators disappear, preserving fresh food will not be easy anymore. 嗯。thirdly, if refrigerated disappeared, everyone will have to buy as well as drink fresh mail daily. Keeping milk over night might . spoil IT um fourty everybody . loves to drink a cold. A refreshing software. If refrigerators disappeared, software industry may have . to close down. hm. Fifthly. without a refrigerator or living in a desert night to be almost impossible to. also our . favorite items like ice cream cake, milk shakes could also be impossible to without regatta. Lastly，no . refrigerator means no, we might have to wait for a snowfall to see ice. and.