Unit 6 Electricity everywhere(language points and something about electricity) 课件 2025-2026学年沪教版七年级英语下册

该初中英语课件围绕“电的重要性”展开，涵盖语言知识（如teach sb. about sth.、without用法等语法点及相关词汇）与电的科普、环保内容。通过Key question和Before you read的思考问题、小测验导入，以Daisy的记叙文“A switch-off weekend”为语篇支架，逐步过渡到电的来源、发电过程及环保知识，构建语言学习与主题探究的脉络。 其亮点在于融合语言能力与思维品质、文化意识培养，通过真实情境记叙文帮助学生在语境中掌握语法词汇，提升语言理解与表达能力。结合电的来源探究、中国2025低碳目标及地球一小时等环保内容，引导学生分析问题并增强社会责任感。采用任务型与情境教学，搭配图片辅助和词汇语法注释，学生能提升综合能力，教师可直接使用丰富素材优化教学。

Unit 6 Electricity everywhere How important is electricity? Key question Part 1 Language points Part 2 Something about electricity Contexts Part 1 Language points A switch-off weekend by Daisy from Grade 7 Last week, our science teacher, Mrs Brown, taught us about electricity and how important it is. Then she gave us a special task: to try living without electricity for a weekend. Our family thought it sounded interesting, so we decided to do it together. 作者信息 一般过去时 句子主语 插入语，作解释说明 teach sb. about sth. teach sb. to do sth. teach sb. sth. give sb. sth. give sth. to sb. 介词，做否定含义，表“没有、缺乏” decide to do sth. 决定做... 感官动词后接adj. for+一段时间，表示持续多久 However, it turned out that it was very hard to live without electricity. After it got dark, my little brother Benny and I could only read and write by candlelight. We usually watch a movie together on Friday nights, but the TV doesn’t work without electricity. Instead, we played video games for a while, but then our tablet ran out of battery. “What about tomorrow?” we thought. 证明是 It+be动词+adj.+(for sb.)+to do sth. （对某人来说，）做...是怎么样的 系表结构，系动词+形容词 通过...，可接动词的ing形式 看电影 打电子游戏 一会儿 run out of 用完、耗尽 Since there wasn’t any electricity, some things in the fridge quickly went bad. When we woke up on Saturday morning, we discovered that we couldn’t eat our breakfast cereal — we didn’t have any milk or yogurt! By noon, it got really hot inside our apartment, but we couldn’t turn on the air conditioner. Even worse, most household tasks became very difficult without electricity. For example, we had to wash all our clothes by hand, and this took us a lot of time. 自从...以来 go bad 变质 wake up 醒来 麦片 在否定句中，意为“和” 到了中午 打开（电器） 空调 更糟糕的是 家务活 例如，用于句首 have to do sth. 不得不做...（因客观原因造成的） 用手... It take sb.+时间/金钱+to do sth. 花某人多少时间/金钱做... 许多 However, there were also nice things about living without electricity. On Sunday, we went on a bike trip and visited my grandparents in the countryside. We enjoyed a picnic in their garden, and we also played chess and painted pictures together. At night, we sat under the stars and listened to my grandad’s stories. This was a really interesting experience, but I cannot imagine living without electricity for more than a few days. go on a bike trip 骑行 乡下、乡村 下棋 listen to 听... imagine doing sth. 想象做... =over 意为“超过” 一些，修饰可数名词 Part 2 Something about electricity In our daily lives, what kinds of things needs electricity? Electricity rice cooker fridge phone car bulb washing machine air conditioner In our daily lives, what kinds of things needs electricity? Electricity electric fan television microwave oven hair dryer 电作为自然现象确实是被发现的。比如古希腊人摩擦琥珀产生静电，还有本杰明·富兰克林的风筝实验，这些都说明电是自然界存在的现象，所以属于发现。 伏打发明了电池，法拉第发明了发电机，爱迪生和特斯拉分别发展了直流电和交流电系统，这些都是人类创造的技术，所以属于发明。电力的应用推动了第二次工业革命，这显然涉及到技术上的创新和应用，属于发明的范畴。 Where does electricity come from? Is electricity an inventionor a discovery? How fast does electricity travel? lightning static electricity /ˈstætɪk/ 300million metres per second 3亿米/秒（先看到再听到闪电） 超越光速=时光穿梭？ 现有物理规则下，有质量物体无法抵达、超越光速；依靠超光速回到过去行不通，但去往未来真实可行，已有实验佐证。 1.无法达到 / 超越光速 狭义相对论表明，带质量物体越接近光速质量越大，抵达光速需要无限能量，现实做不到，科幻超光速设备不存在。 2.超光速也不能回到过去 速度越快时间越慢，光速下时间静止，仅数学推算中超光速会出现时间倒流；但一是物理层面无法实现超光速，二是会产生祖父悖论（回到过去杀死祖辈，自身便不会诞生，形成逻辑矛盾），因此学界认定回到过去不可能。 3.去往未来具备可行性 两种合规方式：①乘坐近光速飞船高速飞行，自身衰老缓慢，返回地球后地球已度过漫长岁月；②待在黑洞这类强引力区域，外界时间飞速流逝，两种方式都能实现抵达未来。 man-made man-made in nature Before you read Where does electricity come from? 能量守恒 发电的过程实质上就是能量守恒的过程。 1. 发电只是能量转化，不会凭空产生电能：水力是水能、火力是化学能、风力是风能，先转化为机械能，再通过发电机转化为电能。 2. 转化中会有损耗（发热、摩擦、噪音），损耗的能量变成热能等其他形式能量。 3. 全部原始能量 = 输出电能 + 各类损耗能量，总能量总量不变，符合能量守恒。 wind power water power solar power Let’s think more about these pictures! Before you read 可再生能源 Global Warming Climate Change Earth Hour Background information 地球一小时（Earth Hour）是世界自然基金会（WWF）应对全球气候变化所提出的一项全球性节能活动，提倡于每年三月最后一个星期六的当地时间晚上20:30（2024年地球一小时时间为3月30日晚上20:30），家庭及商界用户关上不必要的电灯及耗电产品一小时，以此来表明他们对应对气候变化行动的支持。过量二氧化碳排放导致的气候变化已经极大地威胁到地球上人类的生存。所以公众只有通过改变全球民众对于二氧化碳排放的态度，才能减轻这一威胁对世界造成的影响。 EVCapture4.2.2软件录制 Lavf57.25.100 本视频由湖南一唯信息科技开发的EV录屏软件录制，www.ieway.cn $