Unit 5 Amazing nature Developing ideas 教案-2024-2025学年外研版（2024）七年级英语下册

教学设计 课题 Unit 5 Amazing nature-Developing ideas 课时 1 教学目标 Language Ability: Master key vocabulary (e.g., amazing, nature, survive) and grammar (simple present tense for facts). Cultural Awareness: Explore global natural wonders and respect for diverse ecosystems. Thinking Quality: Analyze how living things adapt to environments through critical thinking. Learning Capacity: Develop reading strategies (skimming/scanning) to acquire nature-related knowledge. 重难点 Key: Describe natural phenomena using correct tenses and vivid adjectives. Difficult: Understand complex texts about animal adaptations (e.g., camouflage, hibernation) and apply logical reasoning to explain them. Practice integrating language with real-world nature cases. 教学环节 学习活动 新课教学 Teacher: Good morning, class! How are you today? I hope you're all full of energy because we're going to have an exciting class today. So, before we start, let me ask you a question. What's the most amazing natural thing you've ever seen? It could be a beautiful sunset, a huge waterfall, or maybe some strange but fascinating plants. Raise your hands and share your experiences with us. Student A: I once saw a double rainbow. It was so beautiful, with two clear arcs of colors in the sky. Teacher: Wow, a double rainbow! That's really amazing. The colors of a rainbow are one of the most wonderful natural spectacles. The light refracts and reflects in raindrops to create those beautiful bands of color. What about others? Student B: I went to the beach, and the waves were huge. They were crashing onto the shore, and it was so powerful. Teacher: The power of the ocean waves is indeed astonishing. The ocean is full of mysteries and amazing phenomena. Now, today we're going to explore more amazing aspects of nature in our new lesson “Unit 5 Amazing nature - Developing ideas”. Teacher: First, let's have a look at some pictures on the PPT. Here are some natural wonders from all over the world. Look at this one, it's the Grand Canyon in the United States. The deep, wide canyon with its colorful rock layers is really a masterpiece of nature. And this is the Great Barrier Reef in Australia, a vast underwater world full of colorful corals and various marine creatures. Can you imagine how amazing it is to swim among them? Now, I want you to think about this: What makes these natural wonders so special? Discuss with your partners sitting next to you for about 2 minutes, and then we'll share your ideas. (Students discuss) Teacher: Time's up. Let's start sharing. Who wants to go first? Student C: The Grand Canyon is special because it's so big and the colors of the rocks are really beautiful. Teacher: Absolutely. The scale and the unique geological features make it a wonder. And the colors are the result of millions of years of geological changes. What about the Great Barrier Reef? Student D: The Great Barrier Reef is amazing because there are so many different kinds of fish and corals. It's like a whole other world under the sea. Teacher: You're right. It's one of the most diverse ecosystems on the planet. The corals provide a home for countless marine animals. Now, let's move on to our text. But before we read, let's learn some new words that will help us understand the text better. Teacher: Look at the screen. The first word is “ecosystem”. An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system. For example, a forest is an ecosystem where trees, animals, insects, and the soil, water, and air all interact with each other. Repeat after me, “ecosystem”. Students: Ecosystem. Teacher: Very good. Next word, “biodiversity”. Biodiversity refers to the variety of life on Earth, including all the different plants, animals, and microorganisms, and the ecosystems they form. A rainforest has high biodiversity because there are so many different species living there. Repeat, “biodiversity”. Students: Biodiversity. Teacher: Great. Now, the word “habitat”. A habitat is the natural environment in which an organism lives. For instance, a polar bear's habitat is the Arctic region with its cold climate, ice, and snow. Let's repeat, “habitat”. Students: Habitat. Teacher: Well done. And the last new word for now, “conservation”. Conservation means the protection, preservation, management, or restoration of natural environments and the wildlife that lives within them. We need to focus on conservation to protect our amazing nature. Repeat, “conservation”. Students: Conservation. Teacher: Excellent. Now that we know these new words, let's have a quick review. I'll describe the meaning, and you tell me the word. First, the variety of life on Earth. What's the word? Students: Biodiversity. Teacher: Right. Next, the natural environment where an organism lives. Students: Habitat. Teacher: Correct. Now, the protection of natural environments. Students: Conservation. Teacher: Perfect. And a community of living and nonliving things interacting as a system. Students: Ecosystem. Teacher: Great job, everyone. Now, let's start reading our text. The text is about some amazing natural wonders and the problems they are facing. I want you to read it quickly and answer this question: What are the three natural wonders mentioned in the text? You have 3 minutes to read. Start now. (Students read the text) Teacher: Time's up. So, who can tell me the three natural wonders mentioned in the text? Student E: The Dead Sea, the rainforest, and the glacier in Glacier National Park. Teacher: Exactly. Well done. Now, let's read the text more carefully. This time, I want you to find out what problems each of these natural wonders is facing. Let's start with the Dead Sea. Who can tell me what's wrong with the Dead Sea according to the text? Student F: The Dead Sea is drying up. Teacher: That's right. The text says that the Dead Sea could die because of the decrease in water levels. Do you know why the water level of the Dead Sea is decreasing? Student G: Maybe because people are using too much water from the rivers that flow into it. Teacher: You're on the right track. The main reason is that the rivers flowing into the Dead Sea are diverted for human use, such as irrigation and drinking water. As a result, less water reaches the Dead Sea, and it's drying up. Now, let's move on to the rainforest. What problem is the rainforest facing? Student H: The rainforest is disappearing. Teacher: Correct. Deforestation is the main cause. People cut down trees for various reasons like logging for timber, making space for agriculture, and building settlements. What are the consequences of the rainforest disappearing? Discuss in your groups for 2 minutes. (Students discuss) Teacher: Let's hear some of your ideas. Student I: Many animals will lose their homes, and some species might become extinct. Teacher: That's a very serious consequence. The rainforest is home to a large number of plant and animal species. When the rainforest disappears, their habitats are destroyed. Student J: It will also affect the climate. The rainforest helps absorb carbon dioxide, and if it's gone, there will be more carbon dioxide in the air, which will make the climate change worse. Teacher: Excellent point. The rainforest plays a crucial role in regulating the Earth's climate. Now, let's look at the glacier in Glacier National Park. What's happening to it? Student K: The glacier is turning into water. It's melting. Teacher: Yes, due to global warming, the temperature is rising, and the glaciers are melting at an alarming rate. What will happen if the glaciers keep melting? Student L: Sea levels will rise, and it will flood many coastal areas. Teacher: Right. It will have a huge impact on human lives and the environment. Now, let's look at the way the text is written. The author uses a very interesting technique. Can you figure out what it is? The Dead Sea, the rainforest, and the glacier are all “speaking” in the text. Student M: It's personification. Teacher: Exactly. Personification is giving human characteristics or feelings to nonhuman things. Why do you think the author uses personification here? Discuss in your groups. (Students discuss) Teacher: Time to share. Student N: It makes the text more interesting and easier to understand. It's like the natural wonders are telling us their problems directly. Teacher: That's a great point. It also makes us feel more connected to these natural wonders and understand the urgency of the problems they are facing. Now, let's think about this: Why is it important to stop these natural wonders from disappearing? Student O: Because they are part of our Earth, and if they disappear, the whole ecosystem will be affected, and it will also affect our lives. Teacher: Absolutely. These natural wonders are not only beautiful but also essential for the balance of our planet. They provide habitats for wildlife, help regulate the climate, and even have an impact on our economy, like tourism. So, what can we do to protect these natural wonders? Let's have a group discussion. Each group comes up with at least three ways to protect nature. You have 5 minutes. (Students discuss) Teacher: Time's up. Let's start sharing your ideas. Group 1, you go first. Group 1 Representative: We can plant more trees to help the rainforest, reduce our water use to help the Dead Sea, and use less energy to slow down global warming for the glaciers. Teacher: Those are very practical suggestions. Planting trees can help restore the rainforest, conserving water can make more water reach the Dead Sea, and reducing energy use can help mitigate global warming. Group 2, what are your ideas? Group 2 Representative: We can support conservation organizations, use reusable products instead of single - use ones, and promote environmental awareness among our friends and family. Teacher: Great ideas. Supporting conservation organizations can provide financial and other resources for protecting nature. Using reusable products can reduce waste and pollution. And spreading environmental awareness can make more people care about nature. Teacher: Now, let's summarize what we've learned today. We learned about some amazing natural wonders like the Dead Sea, the rainforest, and the glacier in Glacier National Park. We also learned about the problems they are facing, such as drying up, disappearing, and melting. We understood the importance of protecting these natural wonders and came up with some ways to do it. For homework, I want you to write a short paragraph about one of the natural wonders we talked about today. Describe the wonder, the problem it's facing, and what we can do to protect it. Make sure to use the new words we learned today. Teacher: That's all for today's class. I hope you all have a great day and remember to always appreciate and protect our amazing nature. Goodbye, class! 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 $$