Unit7 The secret of memory（ Focusing on culture）课件 2025-2026学年沪教版英语八年级上册

该初中英语课件聚焦树木年轮主题，通过"Think and say"思考自然记忆、"Look and say"观察树桩年轮、"Look and match"匹配年轮显示内容，搭建从生活现象到科学知识的学习支架，帮助学生提取关键信息，理解年轮在历史、气候研究中的应用。 其亮点在于融合语言能力与思维品质，通过"Read and answer"提取信息、"Read and complete"完成思维导图、"Discuss and say"总结年轮秘密，结合跨学科词汇（如dendrochronology），培养学生结构化思维与表达能力。多样活动如"Think and share"拓展年轮知识（指示方向、10000年记录），作业引导探究科学家研究方法，提升自主学习能力，教师可借助此资料激发学生科学兴趣，提高教学效果。

英语沪教版八年级上册 Focusing on culture of memory The secret Unit 7 Learning objectives 读懂关于“树的记忆”的文章，提取关键信息。 01 了解树木年轮的科学意义及其在历史、气候研究中的应用。 02 通过本课时的学习，学生能够： 重点 Do you think nature is able to remember past events? If yes, how? Think and say Human beings have the ability to remember the past. Let’s explore. 1. What can you see? I can see tree trunks. Look and say 2. What do you think these circles inside the tree trunk are? They are tree rings. What do the tree rings show? Look and match first year growth rainy season dry season scar from forest fire first year growth rainy season dry season scar from forest fire Read and answer What is the main idea of the article? What are tree rings, and why are they called the “memories of trees”. How do tree rings help us understand the past? How can scientists tell the age of a tree by looking at its tree rings? What do wide tree rings show? What do narrow tree rings mean? What does a black area on a tree ring mean? Read and answer 1. What is the main idea of the article? 2. What are tree rings, and why are they called the “memories of trees”? 3. How do tree rings help us understand the past? Tree rings can tell us things about the past. Tree rings are the circles inside a tree trunk. Each year a tree grows, there is a new ring. The writer calls them the “memories of trees” because they contain information about the past. For example, they are a record of natural events and climate in the past. Scientists can look at tree rings and learn about past climate change and natural disasters such as forest fires. They can also use tree rings to learn about human history. For example, scientists can study old wood and find out when the tree was cut down. They can also use it to to tell the age of old buildings. Read and answer 4. How can scientists tell the age of a tree by looking at its tree rings? 5. What do wide tree rings show? 6. What do narrow tree rings mean? Scientists can tell the age of a tree by counting the rings inside the tree trunk. A wide tree ring shows that the tree grew well that year. This happens when the tree gets enough sun and rain. A narrow tree ring means that the tree did not grow as much that year. This can happen when a tree doesn’t get enough water. 7. What does a black area on a tree ring mean? A black area on a tree ring usually means there was a forest fire. Scientists can count the rings from the black area to determine when the fire happened. Read and complete Read the text carefully complete the mind map. are a record of climate change provide information about natural disasters help us understand human history Scientists study the ring patterns to learn about climate change in a place. Scientists look at tree rings to study natural disasters. Scientists use tree ring patterns to find the age of old buildings. Read and answer 1. What is the name of the science that studies tree rings? This branch of science is called dendrochronology. 2. How do experts in this field collect data about the past using tree rings? They compare tree rings from different trees in the same area to collect data about the past. Find the words and phrases in the article and match them with their meanings. Find and match Think and share What else do you know about tree rings? Share with your classmates. Sometimes trees make extra rings or no rings in a year. In the North, tree rings are wider on the south side—they can show you directions! Some tree ring records are over 10,000 years old! ... Discuss and say What secrets can tree rings tell us? Age, climate, disasters, history. What impressed you most today? Even though trees cannot speak, their rings contain secrets and act as a history book for our planet, telling stories about age, weather, disasters and human life long ago. → How? Count the tree rings. Summary What can tree rings tell us? → How? Look at the width of tree rings. Wide ring = Good year (sun + rain) Narrow ring = Bad year (drought) 2. Climate / Environment 1. Age What can tree rings tell us? → How? Look at the marks & chemistry. Black scar = Forest fire Chemistry = Date buildings / events (e.g., Viking village - 1021 CE) Summary 3. History & Disasters Homework Share the interesting facts about tree rings with your friends. 01 To learn about how scientists study tree rings, you can try to explore the following questions: How do they find trees to study?  What tools do they use? What have they discovered about the past? Why is their work important? 02 Bye-bye $