Unit7 Reading2课件 2025-2026学年译林版英语 八年级上册

该初中英语课件围绕“自然世界中的生态系统”主题，系统介绍海洋、湿地、森林三大生态系统的特征、功能及人类活动影响，通过生动比喻（如“地球心脏”“肾脏”“肺部”）和数据对比表格搭建学习支架，引导学生从认知生态系统到用英语复述关键信息。 其亮点在于融合语言能力与思维品质培养，通过词汇语法练习（如include用法、millions of短语）、听力填空及阅读理解提升语言运用能力，结合“人类活动如何影响生态系统”等拓展问题激发分析思考，增强环保意识（文化意识）。教师可借助多样化活动（小组讨论、海报制作）提高教学效率，学生在语言学习中深化生态保护责任感。

Unit 7 The natural world Yolanda Reading II Learning objectives To introduce the characteristics and functions of ecosystems; Be able to briefly retell key information about these three major ecosystems in English, and clearly express their understanding of ecosystems in group discussions. Be able to master the key words, phrases and sentence patterns of this lesson; Be able to discuss the impact of human activities on the ecological environment and enhance the awareness of ecological protection. What are the big three ecosystems? oceans wetlands forests Resision 3 Ecosystem Size Function（功能） "heart" "kidneys" "lungs" around 71% about 6% nearly a third oceans wetlands forests produces oxygen water cycle home to plants and animals clean water prevents floods produce oxygen trap harmful things clean the air What writing skills are used in these sentences? simile （明喻） more vivid（生动） Give numbers（列数字） more accurate（精确） The big three: oceans, wetlands and forests An ecosystem _________(include) all the living and non-living things in an area. Ecosystems can be of different ______(size), from small ponds to large grasslands. Each ecosystem has a role _______(play) and helps ________(keep) the balance between all its members and the greater environment. The ocean is a very large ecosystem on earth. It _______(cover) around 71% of the earth’s surface and __________(produce) about 70% of the earth's oxygen. It holds __________(很多) salt water, and the water rises to the sky, falls onto the land and then ___________(返回到) the ocean. This goes on and on, so the ocean is just like the “heart” of the earth. includes sizes to play (to)keep covers produces plenty of returns to Read and fill Wetlands only cover about 6% of the earth’s land area. But they ____________ about 40% of all the types of plants and animals. Plants in wetlands help ______________(清除) pollution and make the water clean. Wetlands can also help ____________(prevent) floods. During heavy rains, wetlands _______water like giant sponges. They act like the “kidneys” of the earth. Forests _________ nearly a third of the earth’s land area. Plants there ________ carbon dioxide from the air and produce oxygen. They also trap _________(harm) things in their leaves and help clean the air. __________, people often call forests the “lungs” of the earth. Each of these ecosystems supports ___________(数百万) plants and animals.They keep the planet healthy and make our world a better place. are home to (to) get rid of (to)prevent store make up harmful take in Therefore millions of a   Cover 71% of the earth’s surface b   Cover nearly a third of the earth’s land area c    Help clean the water d    Help make the air clean e    Help prevent floods f     Produce about 70% of the earth’s oxygen g    The “heart” of the earth h    The “lungs” of the earth i     The “kidneys” of the earth a f g c e i b d h Exercise An ecosystem includes all the living and non-living things in an area." The ocean covers around 71% of the earth’s surface.” “During heavy rains, wetlands store water like giant sponges.” “Trap” here means pollution is captured and held in leaves. “Keep” fits best. The article explains scientific facts about ecosystems, typical of geography or science magazines. surface is home to oxygen take in store role 扮演重要角色、起重要作用 减缓气候变化 9 get rid of balance 海洋污染 许多塑料 是时候... ...的平衡 1.include v.包括，包含 including 介，包括（常和前面的内容用逗号隔开） Language point 这本书包含了所有的英语语法。 The book includes all the grammar in English. 他们参加了所有的活动，包括登山。 They take part in all the activities, including climbing. 1.Our group _______ Tom and Tim. There are altogether 8 students. A. included B. includes C. including D. include Language point 2.句中的 have a role to play 表示“发挥作用，有责任”，动词不定式 to play 充当定语，修饰前面的名词 role，并与名词构成动宾关系。 There are lots of things to do in the park. 在这个公园有许多事情可做。 play a role of...扮演...角色 起...作用 China plays an important role in the world. 3.around adv 大约,用于表示数量、时间、年龄等的不确切或近似数。 around 介，在……周围,围绕 look around 环视；向四周看 go around the cith在城市周围走动 walk/go around到处走动 around+地点 在某地周围 1.Ten years later, _______________ (大约) 4, 700 species (物种) unknown before from the ocean floor were discovered. 2.现在有超过20 种鸟生活在这条河流的周围。______________________________________________________ around/about Now, there are more than 20 kinds of birds living around the river. 4. hold vt. 容纳；拿着；举行 hold 作动词： ①容纳：指某个空间的大小能装下一些人或物； ②拿着：指用手拿着某些物品； ③举行：指举行会议或活动； ④承载、支撑：指承载某种物体的重量。 hold on 别挂断电话；稍等 hold off = put off 推迟 The room can hold 200 people. He held a pen in one hand and a ruler in the other. 这个房间可以容纳200人。 他一只手拿着钢笔另一只手拿着尺子。 6. rise-rose-risen Vi. 上升，升起;上涨 其后不接宾语 raise-raised Vt. 养育;筹集;举起;提高 其后接宾语 The sun in the east. 太阳从东方升起。 The girl the boxes onto the truck. rises raised 8. return v.返回;回去,回来,归还 return to +地点,意为“返回某地”。 return sth. to sb. 把某物归还给某人 in return 作为回报 He returned to his hometown after many years. 多年以后他返回了家乡。 周一以前你必须把书还给图书馆。 You must return the book to the library before Monday. 8. get rid of v.清除；摆脱；丢弃,表示清除某种不良影响；摆脱某人或某种困境；丢弃不想要的物品等。 我这头疼老也不好。 I can't get rid of this headache。 你最好改掉这些坏习惯 You had better get rid of these bad habits. John decided to get rid of his old books. 约翰决定清理他的旧书。 9.prevent v.防止,阻止 prevent sb. from doing sth. stop sb. ( from) doing sth. keep sb. from doing sth. 阻止某人做某事 雨阻止了我们外出玩耍。 The rain prevented us from going out to play We tried to prevent him, but we failed. 我们试图阻止他，可是没有成功。 10. store v.贮存；存储,后面可以直接接名词作宾语。 n.商店 store up 意为“储存；积累”。 The pond stores much rainwater in summer.这个池塘夏天储存很多雨水。 The little squirrel stores up food in a tree hole in winter. 冬天小松鼠把食物存在一个树洞里 11. act vi起作用;行动 vt.扮演 act like 表现得像… act as 充当；担任 act out 表演出来 act to do sth=take action to do sth We need to act quickly to solve the problem. 我们需要立即行动来解决问题。 The new student acts very well in class. 那个新生在班里表现很好。 He acted the part of a doctor in the TV play. 在那部电视剧中他扮演了医生的角色。 12. make up (1)占据总量中的一定分量 (2)编造故事或借口 (3)组成(一个集体或团队) (4)化妆；打扮。 (5)整理床铺 Women teachers make up a half of the teachers in this school. The teacher made up a funny story for his new lesson. We need two more players to make up a soccer team. 女教师占据了本校教师的一半。 老师为他的新课编了一个有趣的故事。 我们还需要两名队员来组成足球队。 13.take in 吸收 take up 占据（时间，空间），从事 take care小心，保重 take out 拿出，去除 14.harm v/n.伤害；损害 harmful adj.有害的 do harm to 对……有害 be harmful to 对……有害 1. Many people worry that too much screen time will ______ (harm) their children’s eyes. 2. Fire is _________(harm). Keep your children away from it. 3. Drinking too much juice can ______ ________ ____ children’s teeth. harm harmful do/be harm /harmful to 15. millions of 数以百万计的 hundreds of 成千上万 thousands of 成百上千 具体数字+ hundred/thousand/million 1.People plant ______ trees on Tree Planting Day every year. A. hundred B. hundreds of C. hundreds D. hundred of 2.冬天，数以百万计的鸟儿飞向南方。 In winter, __________ ______ birds fly to the south. millions of live /liv/ v.居住 /laiv/ adj.现场直播/演出的 I live in Beijing.我居住在北京。 a live concert 一场现场直播音乐会 lively adj.活泼的；生动的 She is a lively girl. 她是一个活泼的女孩儿。 All of the flowers in the garden are quite lively.花园里的花很有生机。 living adj.活着的(作前置定语);健在的 n.生计；生活方式 Are your grandparents still living? 你的爷爷奶奶还健在嘛？ make a living 谋生 all living things 所有的生物 alive adj.活着的(作表语/后置定语) 强调生与死的界限 She is still alive.她还活着。 He is the only man alive. 他是唯一的幸存者。 The        animal attracted many people's attention at the zoo. A. living         B. alive          C. live         D. lively What other ecosystems do you know about? desert grassland mountain Further-thinking What can we do to protect these ecosystems? Be aware of the importance of the ecosystems. Make a poster to call for more people to take action. Stop cutting down trees and plant more trees. Use environment-friendly products. ... 25 1.Because each ecosystem has a role to play and helps keep the balance between all its members and the greater environment. 2. Some non-living things in an ecosystem include water, air, soil, and sunlight. They are extremely important. For example, sunlight is the primary source of energy for most ecosystems. Human activities can have both positive and negative impacts on ecosystems. Here is an example of the negative impact: Humans cut down large areas of forests for various reasons such as building houses and making furniture. This destroys the habitats of many wild animals and plants. 一、用所给单词的适当形式填空 1. The famous actress              (act) in many films. 2. When hearing the death of his pet dog, the boy cries              (sad). 3. Farmers produce millions of             (ton) of wheat to feed the nation. 4. The smoke from cigarettes (香烟)             (harm) not only smokers but also other people. 5. Cells (细胞) are the smallest and most basic units of ________ (live) matter. acted sadly tons harms living Exercise 1.It’s wise of our government to make laws           the people             in schools, hospitals and many other public places. A. to protect; to smoke         B. to protect; smoking       C. to prevent; to smoke      D. to prevent; smoking 2.In our school library, there _________ a number of books about science and the number of them _________ growing larger and larger. A. is; is B. are; are C. are; is D. is; are 3.—Does Hong Kong Disneyland ______ different parks? —Yes, there are many parks in it, ______ Tomorrow land and Fantasy land. A. include; including B. including; include C. include; include D. including; including THANK YOU 金山办公软件有限公司 $