Unit 5 Understanding ideas 课件 2025-2026学年外研版七年级英语上册

该初中英语课件围绕“植物的力量”主题，聚焦植物作用及光合作用原理，通过图片提问、视频导入等方式，从学生已知的植物常识（如吃虫、药用）过渡到光合作用的科学过程，搭建从具体到抽象的学习支架。 其亮点在于采用拟人化叙事（“植物工厂”“叶绿素工人”）将光合作用具象化，结合视频、结构图等资源，培养学生语言能力（词汇句型运用）和思维品质（分析推断）。多样化任务（复述、跨学科探究）提升学习能力，学生能在生动情境中掌握知识，教师可借助资料高效开展互动教学。

Unit 5 The power of plants 第1课时 (Starting out & Understanding ideas) 外研·七年级上册 Lead-in 1. What’s this? 2. What is happening in the picture? 3. Is it powerful? It’s a plant. The plant is coming out of the ground. Yes. It’s powerful. 2 Starting out 1 Look at the picture and answer the questions. 1 What facts about plants do you know? 2 Do you think plants are amazing? Why or why not? 1 What facts about plants do you know? What facts about plants do you know? Some plants eat bugs. Many plants are used for medicine. Plants have different colours. Some plants are poisonous(有毒的). 2 Do you think plants are amazing? Why or why not? Yes, I do. Some plants have strong vitality (生命力) and can even grow in the desert. Watch and know 2 Look at the pictures and answer the questions. 1 What are the people doing? 2 What can plants do for us? 1 What are the people doing? She is buying some vegetables. He is working on wood. She is drawing trees and grass. They are weighing the herbs (药草). 2 What can plants do for us? They can provide food. They can provide building materials. They can be inspiration for painting. Some plants are medicine. What is the video about? It is about the things that help a seed grow into a plant and then into a flower. Let's come to the passage and learn more about it. What can you see in the picture? A plant. Do you know the names of its parts? leaf stem root What can you see in the picture? 1. Where is it? It's like a factory. It is in a workshop in the leaf. 2. Who are in the workshop? Workers in green uniforms. 3. What are the workers going to produce? How are they going to produce it? sugar sunlight water sunlight sugar water Look at the picture and try to match the words to it. 1 P80 Now, let's read to check your answers. While-reading Read the passage and check your answers. 2 It’s quarter past seven. Here’s Worker No.55 in his green uniform. He’s going to start work in the plant. He works in Workshop 1001 in the Leaf. There are 20 to 100 workers in each workshop. They collect sunlight and CO2 during the day. 1 2 quarter n. 一刻钟，十五分钟 workshop n.车间，工场 collect v. 收集，采集；使集中 Now workers from the Root send up water. The water will rise up to the Leaf through the Stem. Then workers in the Leaf will mix water, CO2 and sunlight. send v. 送出，发出 rise v. 升高，上升 mix v.（使）混合 What are they going to produce? Most importantly (for them),there will be sugar! It’s useful for the growth of the plant. Another product will be oxygen, but the plant doesn’t need much of it. It means a lot to animals and humans, though—they need it to breathe! The workers work hard. Soon it’s going to get dark. They will take a rest. 3 4 produce v.（自然地）生产，产生，出产 product n.（自然过程或化学反应的）生成物 breathe v. 呼吸 though adv.可是，不过，然而 dark adj. 昏暗的；黑暗的 rest n. 休息（时间） There are millions of plants on earth. They give more than food and oxygen. Without plants, the natural world would be very different! 5 natural adj.自然的,天然的 Pay attention to the expressions. 现在是七点一刻。 穿着绿色制服的 在白天 上升到…… 对……有用 对……意义重大 努力工作 变暗，变黑 = have a rest 休息一下 数百万 地球上 超过，不仅 自然界 把……送上去；使上升；发射 混合……和…… Within a plant 1 It's quarter past seven. Here's Worker No. 55 in his green uniform. He's going to start work in the plant. 2 He works in Workshop 1001 in the Leaf. There are 20 to 100 workers in each workshop. They collect sunlight and CO₂ during the day. Now workers from the Root send up water. The water will rise up to the Leaf through the Stem. Then workers in the Leaf will mix water, CO₂ and sunlight. 植物工厂里 现在是七点十五分。 穿着绿色制服的 将要开始工作 他在叶部的 1001 车间工作。 在白天 往上送水 水会通过茎部上升到叶部。 将水、二氧化碳和阳光混合在一起 3 What are they going to produce? Most importantly (for them), there will be sugar! It's useful for the growth of the plant. Another product will be oxygen, but the plant doesn't need much of it. It means a lot to animals and humans, though – they need it to breathe! 4 The workers work hard. Soon it's going to get dark. They will take a rest. 5 There are millions of plants on earth. They give more than food and oxygen. Without plants, the natural world would be very different! 最重要的 糖能帮助植物生长。 植物本身不需要太多氧气 意义重大 辛勤工作 天黑了 休息 数百万种植物 超过，不仅 自然界 Within a plant Task 1 Skim the passage and answer. Where can we read this passage? A. In a newspaper. B. In a diary. C. In a science magazine. D. In an advertisement. Read Para. 1 carefully, then answer the questions. It’s quarter past seven. Here’s Worker No. 55 in his green uniform. He’s going to start work in the plant. Can you find Worker No. 55 in the picture? What is he going to do ? He is going to start work in the plant. 23 Further thinking 1. Are there any real workers in the plant? 2. Why does the writer use “workers” in the passage? No! Here the writer uses personification (拟人) to make the passage more vivid and easier for the readers to understand. Read Para. 2 carefully, then answer the questions. Where does No.55 worker work? How many workers in each workshop? What do workers do? In Workshop 1001 in the Leaf. There are 20 to 100 workers. Read para. 2 and fill in the blanks. The workers in the Leaf ________ ________ and CO₂ during the day. Now workers from the Root _____________. The water will ________ to the Leaf through the Stem. Then workers in the Leaf will ____ water, CO₂ and sunlight. collect send up water rise up mix water sunlight sunlight How do the workers do? Further thinking What does “Worker” mean? What does “Workshop” mean? Worker is the chlorophyll (叶绿素). Workshop is the chloroplast (叶绿体). Read Para. 3 carefully, then answer the questions. 1. What are the two main products? 2. Which product is useful for the growth of the plant? 3. Which product is important for animals and humans? Why? Sugar and oxygen. Sugar. Oxygen is important for animals and humans because they need it to breathe. Read para. 4 and answer the question. When will the workers take a rest? They will take a rest at night. Read para. 5 and answer the question. What does the writer think of plants? Plants _____ a lot and help a lot. They give _________ food and oxygen to people. They are ___________ to animals and people. mean more than important Watch and know 3 Choose another suitable title and give your reasons. a How to make sugar b How plants work c Why plants are great d Going to the green workshop Compare the two titles. There are some workers in a plant. What do they do in the plant? They works in the plant. “Plant” here means the place the workers work in. Task 4 “Plant” in this title means the living thing. Pun The word “plant” has two meanings. A pun is a word with more than one meaning. It's a clever way to make the passage more interesting. 4 Complete the texts with the words and expressions from the passage. Sunlight and CO2enter the 1______ . 3_______, CO2 and sunlight will turn into 4_______ and oxygen. Oxygen is important to humans – they need it to 5___________ . Water from the root will 2__________ to the leaf through the stem. leaf Water rise up sugar breathe Plants clean the air. Plants help stop floods. They provide homes for animals. They also reduce the effect of climate change. ... In what other ways do plants help the world? Task 7 P82 9. 休息一下 10. 自然界 11. 对……有用 12. 对……意义重大 13. 穿着绿色制服的 14. 现在是七点一刻。 15. 混合……和…… Translate the following expressions into English. 5. 在白天 6. 超过，不仅 7. 变暗，变黑 8. 努力工作 1. 送上去 2. 地球上 3. 数百万 4. 上升到…… Task 5 send up on earth millions of rise up to during the day more than get dark work hard take a rest the natural world be useful for mean a lot to... in the green uniform It's quarter past seven. mix ... and ... Post-reading Watch the video to know about photosynthesis(光合作用). water sunlight Retell how plants work based on the picture and information. rise up to the leaf through the stem Photosynthesis Task 6 sugar enter the leaf enter the leaf mix ... and ... turn into important to humans, breath 1. Within a plant 在植物（工厂）内部 within 句中用作介词，意为"在(建筑或地区 )里"。 ① The noise comes from within the building. ② There is a new footpaths(人行小道) within the park. 吵闹声是从楼房里传出来的。 公园里有一条新的人行小道。 within 作介词时，还有"在(某段时间)之内"和"在(某段距离)之间"之意。 ① I am coming within 20 minutes. ② Her home is within a short walk from the school. 我将在20分钟内到达。 她的家离学校很近，可以走路到达。 2. It's quarter past seven. 现在是七点一刻。 quarter 意为"一刻钟，十五分钟"。 Please wait for a quarter. 请等十五分钟。 quarter 意为"四分之一"。 I ate a quarter of the pizza for lunch. 我午餐吃了四分之一的披萨。 英语钟点时刻的表达方式: ① 时钟+分钟 seven fifteen ②分钟+past/to+ 时钟 a. 当分钟小于或等于30时，用"分钟+past+时钟"表示"几点过几分"； 七点半 七点十五 七点四十五 seven thirty seven forty-five b. 当分钟大于30时，用"到下个时钟差的分钟数+to+下个时钟"表示"差几分到几点"。 twenty past eight 八点二十 half past six 六点半 a quarter to five 四点四十五(差十五分五点) six o'clock ③ 整点可用"基数词+o'clock"表示。 六点钟 3. Now workers from the Root send up water. send send up send sb. sth. / send sth. to sb. send for 作动词，意为“送出，发出” ① China sent up the first man-made satellite in 1970. ② Kangkang sent a card to me on my birthday. ③ She is in a bad situation. We must send for a doctor. 中国于1970年发射了第一颗人造卫星。 生日那天康康寄给我一张卡片。 现在根部的工人往上送水。 她情况很不好。我们必须派人去请医生。 把……送上去；使上升；发射 邮寄；发送 派人去请 4. The water will rise up to the Leaf through the Stem. through 句中用作介词，意为"通过"。 ① Water will be pumped (用泵抽送) through a pipe. ② Oxygen is released (释放) into the air through the stomata (气孔) of the leaves. 水将通过水管抽出。 氧气通过叶子的气孔释放到空气中。 水会通过茎上升到叶片上。 5. It means a lot to animals and humans, though -they need it to breathe! 不过，它(氧气)对动物和人类来说意义重大— 他们需要它来呼吸! mean a lot to 对……来说很重要，对……意义重大 ① Family means a lot to me. ② Her support during tough times means a lot to me. 家人对我来说很重要。 在困难时期，她的支持对我来说意义重大。 (2)though 句中用作副词，意为"可是，不过，然而"。用于为前面的句子增加对比或转折性的信息，常常被用在句子末尾。 ① It sounds like a lot of fun. Isn't it very difficult though? ② I didn't get the job. I learnt a lot, though. 听上去很有趣，可是这不是很难吗? 我没有得到这个工作，但是我学到了很多。 though作连词，意为“尽管”，引导让步状语，不能和but 同时使用。 Though it was cold, he went out without a coat. 虽然天气很冷，但他没有穿外套就出去了。 1. 虽然她年轻，但知道很多。 ________________________________________ 2. 他答应要来，不过还没到。 ________________________________________ 翻译句子。 Though she is young, she knows a lot. He promised to come, he hasn’t arrived, though. 6. They will take a rest. 他们将要休息了。 take a rest 休息 ① I'm going upstairs to take a rest. ② Let's take a rest. 我要上楼去休息了。 咱们休息一下吧。 rest作名词，还可意为“剩余部分；其余”。 Don’t give up, or you will regret it for the rest of your life. 不要放弃，否则你余生都会后悔。 7. They give more than food and oxygen. 它们提供的不仅是食物和氧气。 more than 不仅，超过 ① She is more than a friend to me. She is family. ② He knows more than he told us. 对我来说，她不仅仅是朋友，还是家人。 他没把他知道的事全告诉我们。 句中more than用来强调植物对自然界的重要性。 When finishing, exchange your papers to grade each other. (Score one point for each correct answer.) Name Score Now 4 minutes to test your spelling. 1. English-Chinese within quarter though 2. Chinese-English 数百万 在白天 超过，不仅 对……意义重大 现在是七点一刻。 混合……和…… 休息一下 自然界 I. 从方框中选择适当的单词并用其正确形式完成句子。 1. Bob _________ up in a small village. 2. Because of the heavy rain, the river is _________. 3. To keep healthy, we should stop eating junk food and eat _________ food more. 4. Some animals died out because of the _________ change and human activities. 5. When Edward _________ the meeting room, everyone turned to look at him. enter, grow, nature, climate, rise grew rising natural climate entered Ⅱ. 根据汉语提示完成句子，每空一词。 1. 现在是九点一刻。 It’s ______ ______ ______. 2. 这本书对学习英语有用。 The book is ______ ______ learning English. 3. 每年有数以百万计的游客游览长城。 ______ ______ tourists visit the Great Wall every year. 4. 孔子不仅仅是一位教育家，他还是一位伟大的思想家。 Confucius is ______ ______ an educator. He is also a great thinker. 5. 如果我们把蓝色和黄色混合，会生成什么颜色？ What colour will we get if we ______ blue ______ yellow? quarter past nine useful for Millions of more than mix and Homework Listen and read the passage again. Use the words and expressions learned in this lesson to retell the process of photosynthesis in plants. Search online and know more about photosynthesis. Lavf58.20.100 Packed by Bilibili XCoder v2.0.2 2024 Other 100992.0 Lavf58.29.100 Packed by Bilibili XCoder v2.0.2 $光合作用植物和其他生物一样，需要能量才能生存，但它们是通过阳光直接获取能量，而不是从食物中获取。这一过程被称为光合作用，就是通过阳光合成在一起的意思。在光合作用过程中，一株植物能通过叶子获取阳光中的能量，并通过水和二氧化碳将它转化成葡萄糖，葡萄糖可用作生命燃料或者成为机体生长的必要基本物质。光合作用是大自然中最重要的生命过程，如果没有光合作用，植物就不能生长，如果没有植物，动物就不能生存。在光合作用的过程中，经由叶片上的气孔吸入二氧化碳，并由根部吸收水分，在阳光的照射下将二者转变成葡萄糖，同时产生附属产物氧气。然后葡萄糖从叶子被运往植株各部位，同时氧气被释放到空气中。植物包含一种绿色色素，称为叶绿素，这种色素在光合作用中至关重要，它能吸收阳光中的能量，并将将其转化成化学能量。不是所有的光都能被吸收，阳光中包含多种不同颜色的光，叶绿素只能吸收红光和蓝光，绿光被反射出去。这也是为什么我们看见植物是绿色的，植物不是唯一进行光合作用的生物，许多细菌也通过光合作用来获取能量，并且比植物的生存历史长的多。在这类简单生物中，最重要的一种叫做蓝细菌。植物中的叶绿素是由百万年前类似细菌的生物体进化而来的。 Pack the amount of Greenhouse gases in the atmosphere in two ways. First, when trees are filed, they release the carbon they are storing into the atmosphere. Second, trees played a critical role in absorbing the Greenhouse gases that fuel global warming. Fewer forest mean larger amounts of Greenhouse gases entering the atmosphere and increased speed and severity of global warming. In addition to help them regulate the earth's climate, forests provide habitats for over eighty percent of the plants and animals that live on land. But deforestation destroys these habitats, diminishing biodiversity. Some estimate that four to six thousand rain for species go extinct each year. This also affects the more than two billion people who rely on forest as sources of food and shelter. Plants are living . things. They start off small. They grow, move . and reproduce. make new plants. Some plants are very. very tall. some plants are very small, but all parts are important to life on earth. They make oxygen that we need . to breathe. They provide homes and habitats where animals can live. And food for millions of different . creatures. Including us. Some plants can protect themselves . from . predators with Spike tones or . stinging hairs. Most plants flower . a flowers job . is to make new plants their right colors and sweet sense attract insects and animals to Carry their pollen to other plants. Like us, plants need water and food to grow. They make their own food from sunlight. Some can be unusual and amazing. Plants can be found all over . the world. all around. Plants are everywhere. Hey, little seed, what do you need to help you grow? Little sea? What do you need to help you grow big and strong? Little sea, what do you need to help you grow? I need water. I need end. I need what to help me grow. I need water. I need A, I need one. Growing roots. Growing my steam leaves, stem roots. i'm a plant, little plant. What do you need to help you copy? And strong little plants, what do you need to help you grow? I need water, 我so sunshine，to help me grow big and strong. growing, growing, growing, growing, growing. 啊，more roots. more lives. A flower, but blue. I have . a flower. That's how I grow. The amazing world of plants. Welcome to the world of plants. Are you ready for some amazing facts? Plants are everywhere, on land, in the ocean and even in space. That's cool, right? Plants can speak, but they have surprising power. Let's have a look. How much did you grow last year? Five centimeters? Ten centimeters? Well, bamboo can grow ninety one centimeters in just one day. That's very fast. A lot of food comes from plants. People began to farm and grow their own food over ten thousand years ago. But plants are more than food. They can also keep us healthy. Like Green doctors, we use different plants to make medicines. Please look at the plants near and say hello. They are our great friends.