(
课件网) Unit 7 The secret of memory 主题范畴：人与自我；人与自然 主题群：生活与学习 子主题：自我认识，自我管理，自我提升；积极的学习体验，恰当的学习方法与策略，勤学善思；地球与宇宙探秘 Key question What does it take to remember something 了解自然界事物的记忆特点（以树木年轮为例），以及科学家由此对地球和人类历史的相关研究。 认读和理解文章重点单词、短语、句型的用法; 进一步巩固学习说明文的文本特征，预测阅读篇章的结构和内容。 Learning objectives 学习目标 After learning, I will be able to: v. 包含；含有 p.110 adj. 专指的；特指的 p.110 n. 化学性质；化学 p.110 自然灾害 p.110 弄懂；弄清楚 p.110 1. contain /k n te n/ 2. particular /p t kj l (r)/ 3. chemistry / kem stri/ 4. natural disaster 5. figure out New words and phrases Yes, it is. Because memory helps me remember who I am, who my family members and my friends are. It also helps me to recite Chinese poems, English vocabularies and math formulas (数学公式). Is memory very important Why Warming-up 文化背景 年轮的应用 计算树木年龄：根据年轮数量可推知树木年龄，用于考查森林的年代。 了解当年气候条件：年轮宽窄能反映树木生长与当时当地环境气候的关系。气候条件优越时，树木生长好，木质部增加多，年轮较宽；反之则窄。 判断方向：在北半球，树木年轮较疏的一面是南面，较密的一面是北面；南半球相反。 Think What have scientists learnt about memory Human beings have the ability to remember the past. In one way, nature is also able to remember past events, and this helps scientists learn about the history of the Earth and humankind. P110 人类有记忆过去的能力。在某种程度上，大自然也能够记住过去的事件，这有利于科学家了解地球和人类的历史。 Pre-reading The memories of trees Look at the title and the picture, and guess the topic. tree rings (树木年轮) The memories of trees Read the article about tree rings to learn what they can tell us. P110 Do trees have memories This may seem like a strange question, but trees can actually tell us things about the past. when a tree is cut down, you can see something special inside: rings. These rings are the memories of trees. Tree rings contain lots of secrets from the forest. While-reading Every year the tree grows, there is a new ring. Scientists can count the rings to tell the age of the tree. They also study tree rings to learn about the climate and the environment. Tree rings are a record of the climate. Some rings are quite wide. This is a good sign as it means the tree grew well and was healthy. This happens when the tree gets enough sun and rain. When it doesn’t rain enough, the tree won’t grow as much, and the rings are narrow. Thanks to this, scientists can look at the tree ring patterns to learn about climate change in a particular place. Scientists also look at tree rings to study natural disasters. For example, sometimes there is a black area on a tree ring. This usually means there was a forest fire. If scientists count the rings from the black area, they can answer difficult questions, such as “When did the fire happen ... ...
