Module 3 Journey to space-Unit 2 教案 2024-2025学年外研版（2012）八年级英语下册

教学设计 课题 Module 3 Journey to space-Unit 2 We have not found life on any other planets yet. 课时 1 教学目标 Language Competence: Acquire space-related terms (planet, galaxy, universe) and apply present perfect negative form ("have not found yet"). Cultural Awareness: Discuss the ethical debates and international collaboration in space exploration. Thinking Quality: Evaluate scientific evidence through logical reasoning (e.g., why life is hard to find). Learning Ability: Organize information with mind maps and conduct comparative reading on extraterrestrial life topics. 重难点 Tense distinction: Differentiate present perfect ("have discovered") from past simple ("discovered"). Complex sentence structure: Analyze clauses in "Scientists believe that... but haven’t proved it yet". Reading comprehension: Extract data (e.g., distance of stars) and identify author’s attitude toward life exploration. 教学环节 学习活动 新课教学 Teacher: Good morning, class! Last time, we began our amazing journey to space. We talked about spaceships, astronauts, and some planets. Today, we're going to continue this exciting exploration. But first, let me ask you a question: Do you think there is life on other planets? Raise your hands if you think there is. (Wait for students to raise hands) Oh, quite a few of you believe so! Well, today's topic will be very interesting for you. Open your books to Module 3, Unit 2: We have not found life on any other planets yet. (Write the title on the blackboard) Students: (Open books and look at the title) 词汇导入 Teacher: Before we start reading, let's learn some new words and phrases. Look at the screen. Here is the first word, "environment". (Show a picture of a beautiful forest, clean river, and fresh air on the PPT) The environment includes everything around us, like the air we breathe, the water we drink, and the land we live on. Can you try to pronounce it? Students: (Repeat after the teacher) Environment. Teacher: Great! Now, "galaxy". (Show a picture of a galaxy) A galaxy is a huge group of stars, planets, and other space objects. Our solar system is in the Milky Way Galaxy. Let's read it together. Students: (Read together) Galaxy. Teacher: Next, "universe". (Zoom out from the galaxy picture to show the vast universe) The universe is everything that exists, including all galaxies, stars, planets, and even space itself. Say it with me. Students: (Say) Universe. Teacher: Then we have "light year". (Show an animation explaining light year) A light year is a unit of distance. It's the distance that light travels in one year. Light travels very fast, about 300,000 kilometers per second. So a light year is a really long distance. Repeat after me, light year. Students: Light year. Teacher: And "alone". It means by oneself, without others. For example, "He lives alone." Read it, please. Students: Alone. Teacher: Finally, "communicate". When we communicate with others, we share information, ideas, or feelings, like talking, writing letters, or sending emails. Read after me. Students: Communicate. 阅读前活动 Teacher: Now, let's do a little brainstorming. I'll show you some pictures of different planets in our solar system. (Show pictures of Venus, Jupiter, Saturn, etc. on the PPT) Think about what life might be like on these planets. What kind of environment would living things need? Discuss with your deskmates for two minutes. (Students discuss with their deskmates) Teacher: Time's up. Who would like to share your ideas? Tom, please. Tom: Maybe life on other planets needs water and air, just like on the earth. Teacher: Good idea! Water and air are very important for life as we know it. Any other thoughts? Lucy? Lucy: The temperature should be suitable, not too hot or too cold. Teacher: Excellent! Temperature is also a key factor. Thank you, everyone. Your ideas will help us understand the text better. 阅读练习 1 Teacher: Now, let's start reading the passage. First, read it quickly and try to find the main idea of each paragraph. You have three minutes. Start! (Students read the passage quickly) Teacher: Stop. Let's check. What's the main idea of the first paragraph? Student 1: It talks about how big the universe is. Teacher: Exactly! The universe is so vast that there are billions of stars in the Milky Way Galaxy, and our sun is just one of them. What about the second paragraph? Student 2: It says that there are eight planets in our solar system, and only the earth has life. Teacher: Right! Our earth is special because it has the right environment for life. Now, the third paragraph? Student 3: Scientists have sent spaceships to other planets, but they haven't found life yet. Teacher: Well done! And the last paragraph? Student 4: It says that some scientists believe there must be life on other planets, and they will keep looking for it. Teacher: Great job, everyone! You all grasped the main ideas very well. 阅读练习 2 Teacher: Now, read the passage again carefully. This time, answer the questions on the screen. (Show questions such as "How many stars are there in the Milky Way Galaxy?", "Why is the earth special?", "What have scientists done to look for life on other planets?" etc. on the PPT) You have five minutes. (Students read the passage carefully and answer the questions) Teacher: Time's up. Let's check the answers one by one. For the first question, "How many stars are there in the Milky Way Galaxy?" Who can answer? Student 5: There are billions of stars. Teacher: Correct! The second question, "Why is the earth special?" Student 6: Because it has air, water, and the right temperature for life. Teacher: Excellent! How about "What have scientists done to look for life on other planets?" Student 7: They have sent spaceships to other planets, like Mars. Teacher: Good. Keep up the good work! 语法讲解 Teacher: Now, let's focus on the grammar in this passage. We use the present perfect tense a lot, like "We have not found life on any other planets yet." The present perfect tense is used to talk about an action that started in the past and has a connection to the present. We often use words like "yet", "already", "ever", "never" with it. "Yet" is usually used in negative sentences and questions, and it means up to now. For example, "I haven't finished my homework yet." (Write examples on the blackboard) Teacher: "Already" is used in affirmative sentences to show that something has happened earlier than expected. For example, "She has already eaten lunch." "Ever" is used to ask about experiences in someone's life. For example, "Have you ever been to Beijing?" And "Never" means not at any time. For example, "I have never seen a real panda." Teacher: Now, let's practice. I'll give you some situations, and you use the present perfect tense with these words to make sentences. Suppose your friend asks if you have finished reading a book. What would you say if you haven't? Student 8: I haven't finished reading the book yet. Teacher: Good. What if you have just finished it? Student 9: I have already finished reading the book. Teacher: Excellent! Now, I want you to ask your deskmate if they have ever traveled by plane. (Students ask each other questions) 小组讨论与展示 Teacher: Now, I want you to work in groups of four. Discuss the question: If we find life on other planets one day, what should we do? You can think about how to communicate with them, whether we should protect them, or how they might change our world. You have ten minutes to discuss and write down your ideas. (Students discuss in groups and write down their ideas) Teacher: Time's up. Each group, choose one person to share your group's ideas with the class. Group 1, would you like to start? Group 1 representative: We think we should try to be friendly and learn from them. Maybe they have more advanced technology. Teacher: Great idea! Group 2? Group 2 representative: We should protect their environment and not let our pollution affect them. Teacher: Very thoughtful! Group 3? Group 3 representative: We can exchange cultures and knowledge with them to make both our worlds better. Teacher: Wonderful! All of your ideas are amazing. 总结 Teacher: Today, we explored more about the universe and life on other planets. We learned new words like "environment", "galaxy", "universe", etc. We also understood how to use the present perfect tense with "yet", "already", "ever", and "never". Most importantly, we shared our thoughts about what we should do if we find life on other planets one day. I hope you will keep your love for science and keep exploring the mysteries of the universe. 作业布置 Teacher: For homework, first, copy the new words and phrases five times and make sentences with them. Second, write a short essay about "My Future in Space". You can imagine what you will do in space, where you will go, or what kind of life you will have there. At least 100 words. Finally, search for some interesting facts about space on the Internet and be ready to share them in the next class. Any questions? Students: No. Teacher: Okay. Class is over. Have a great day! 学科网（北京）股份有限公司 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $$