Unit 7 What's the highest mountain in the world-Section A-1a-1c 英文教案 2024-2025学年人教版（2012）八年级英语下册

Unit 7 What's the highest mountain in the world-Section A-1a-1c 【教学目标】 Language Ability: Master vocabulary like "mountain", "height", "desert", and use comparative/superlative degrees correctly (e.g., "highest", "longer than"). Cultural Awareness: Learn about world landmarks (e.g., Qomolangma, Sahara) and appreciate nature's grandeur. Thinking Capacity: Compare geographical features logically (e.g., height, area, length). Learning Ability: Develop note-taking skills for factual information and cooperate in group discussions. 【教学重难点】 Key: Use "the + superlative" (e.g., "the highest mountain") and comparative structures (e.g., "Which is deeper, A or B?"). Difficult: Distinguish between "in" (largest range) and "of" (specific group) in superlative sentences (e.g., "the longest river in Asia"). Memorize accurate measurements (e.g., Qomolangma: 8,848.86 m). 【教学过程】 一、课程导入（Warming-up） Teacher: Good morning, class! Before we start our new lesson today, let's have a little warm-up activity. I will show you some pictures on the screen, and I want you to tell me what you see as quickly as possible. Are you ready? Students: Yes! Teacher: (Shows the first picture of a high mountain) What's this? Student 1: It's a mountain. Teacher: Right! And how about this one? (Shows a picture of a long river) Student 2: It's a river. Teacher: Great. Now, (Shows a picture of a large desert) What do we call this place? Student 3: It's a desert. Teacher: Excellent. And this one? (Shows a picture of a big lake) Student 4: It's a lake. Teacher: Very good. As we can see, our world is full of amazing natural wonders. Today, we are going to learn about some of the most remarkable geographical features in the world. 二、呈现新知识（Presentation） Teacher: First of all, let's look at the new words and phrases in this unit. (Writes the words on the blackboard: Qomolangma, the Nile, the Caspian Sea, the Sahara, desert, square kilometers, deep) Let's read them together. Students: (Read the words after the teacher) Qomolangma, the Nile, the Caspian Sea, the Sahara, desert, square kilometers, deep. Teacher: Very well. Now, do you know which one is the highest mountain in the world? Students: Qomolangma! Teacher: Exactly! Qomolangma is really amazing. It is extremely high. Do you know how high it is? Student 5: It's 8,844.43 meters high. Teacher: That's right! You are so well - informed. We can say “Qomolangma is 8,844.43 meters high.” (Writes the sentence on the blackboard and underlines “8,844.43 meters high”) When we want to describe the height of a mountain, we use this structure: “number + unit + high”. For example, if a mountain is 2,000 meters high, we say “This mountain is 2,000 meters high.” Now, let's practice. I will give you some numbers, and you tell me how to describe the height of a mountain. 3,500 meters. Student 6: This mountain is 3,500 meters high. Teacher: Good. 4,800 meters. Student 7: This mountain is 4,800 meters high. Teacher: Great. Now, let's move on to the longest river in the world. Do you know what it is? Students: The Nile. Teacher: Correct. The Nile is very long. How long is it, do you know? Student 8: It's about 6,671 kilometers long. Teacher: Wonderful. Just like we describe the height of a mountain, when we talk about the length of a river, we use “number + unit + long”. So we can say “The Nile is about 6,671 kilometers long.” (Writes the sentence on the blackboard) Now, let's practice this. I say 5,000 kilometers, you make a sentence. Student 9: This river is 5,000 kilometers long. Teacher: Perfect. Now, what about the deepest salt lake in the world? Any idea? Students: The Caspian Sea. Teacher: Right. The Caspian Sea is extremely deep. It is 1,025 meters deep. We use “number + unit + deep” to describe the depth. So we say “The Caspian Sea is 1,025 meters deep.” (Writes on the blackboard) Let's practice. 800 meters deep. Student 10: This lake is 800 meters deep. Teacher: Well done. And the biggest desert in the world is the Sahara. It is huge. Do you know how big it is? It is about 9,600,000 square kilometers in size. We use “number + unit + in size” to describe the area. So we can say “The Sahara is about 9,600,000 square kilometers in size.” (Writes on the blackboard) Now, if I say 3,000,000 square kilometers in size, make a sentence. Student 11: This desert is about 3,000,000 square kilometers in size. Teacher: Very good. Now, let's look at these geographical facts more closely in activity 1a. 三、活动 1a（Match the facts you know） Teacher: (Shows activity 1a on the screen) In this part, you can see some sentences on the left and some names on the right. Your task is to match the geographical facts with the correct names. First, read the sentences by yourselves carefully. Students: (Read the sentences silently) Teacher: Now, let's start matching. Who wants to come to the blackboard and write the correct letters next to the numbers? Student 12: (Comes to the blackboard and starts matching) Teacher: Let's check the answers together. For the first one, “8,844.43 meters high”, which one should it be matched with? Students: Qomolangma. Teacher: Right. So it's “a”. And for “about 9,600,000 square kilometers in size”? Students: The Sahara. Teacher: Correct, “b”. “1,025 meters deep”? Students: The Caspian Sea. Teacher: Good, “c”. And “6,671 kilometers long”? Students: The Nile. Teacher: Well done, “d”. Great job, everyone. Now we have a better understanding of these amazing geographical features. But there is more to learn. Let's listen to some sentences about them and fill in the blanks in activity 1b. 四、活动 1b（Listen and complete the sentences） Teacher: Before we listen, let's look at the sentences quickly. Try to predict what kind of words might be missing. (Shows activity 1b on the screen) Students: (Look at the sentences) Teacher: Now, listen carefully. I will play the recording for the first time. Just listen and get a general idea. (Plays the recording) Teacher: Now, listen again. This time, fill in the blanks with the words you hear. (Plays the recording again) Teacher: Stop. Let's check the answers. For the first sentence “Qomolangma is _ than any other mountain in the world.” What did you fill in? Student 13: higher Teacher: Right. Because Qomolangma is the highest mountain, it is higher than any other mountain. For the second sentence “The Sahara is _ desert in the world.” Student 14: the biggest Teacher: Correct. It is the largest desert. “The Caspian Sea is _ of all the salt lakes.” Student 15: the deepest Teacher: Well done. It is the deepest among all salt lakes. And “The Nile is _ river in the world.” Student 16: the longest Teacher: Perfect. The Nile is the longest river. Now, let's read these sentences together to make sure we remember them well. Students: (Read the sentences together) Qomolangma is higher than any other mountain in the world. The Sahara is the biggest desert in the world. The Caspian Sea is the deepest of all the salt lakes. The Nile is the longest river in the world. Teacher: Very good. You can see that we are using the superlative forms of adjectives here to describe these unique geographical features. For example, “high - highest”, “big - biggest”, “deep - deepest”, “long - longest”. These superlatives help us to emphasize that these places are the most remarkable in their respective aspects. Now, let's practice using these sentences in a conversation. 五、活动 1c（Role - play the conversation） Teacher: In this activity, I want you to work in pairs. Use the information in 1a and 1b to make a conversation. One person can be A and the other can be B. A starts the conversation by asking a question like “What's the highest mountain in the world?” and B answers. Then you can change roles and ask about other geographical features. Are you clear? Students: Yes. Teacher: Start now. (Students start working in pairs, and the teacher walks around the classroom, listening and providing help if needed) Teacher: Stop. Now, which pair wants to come to the front and show us your conversation? Pair 1: Student A: What's the highest mountain in the world? Student B: Qomolangma. It is 8,844.43 meters high. Student A: What's the longest river in the world? Student B: The Nile. It is about 6,671 kilometers long. Student A: What's the deepest salt lake in the world? Student B: The Caspian Sea. It is 1,025 meters deep. Student A: What's the biggest desert in the world? Student B: The Sahara. It is about 9,600,000 square kilometers in size. Teacher: Great job, you two! Your pronunciation is clear, and you used the information correctly. Let's give them a round of applause. (Students clap) Now, I hope all of you can remember these important geographical facts and how to describe them in English. 六、课堂总结（Summary） Teacher: Class, let's summarize what we have learned today. First, we learned some new words and phrases related to geographical features, such as Qomolangma, the Nile, the Caspian Sea, the Sahara, desert, square kilometers, and deep. Then we learned how to describe the height, length, depth, and area of these features using the structures “number + unit + high / long / deep / in size”. We also learned to use the superlative forms of adjectives to talk about the most remarkable geographical features in the world, like “the highest”, “the longest”, “the deepest”, “the biggest”. Remember these points, and we will continue to explore more interesting knowledge about our world in the next class. 七、布置作业（Homework） Teacher: For your homework today, I want you to write a short passage about one of the geographical features we learned today. You can describe its location, size, and why it is special. And don't forget to use the correct English expressions we learned in class. Also, review what we learned today and be ready for a little quiz in the next class. That's all for today. Class is over. Goodbye, everyone! Students: Goodbye, teacher! 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 学科网（北京）股份有限公司 $$