2019-2020年高中英语Unit4Exploringplants-usinglanguage

上传人:月亮 文档编号:160810695 上传时间:2021-01-12 格式:PDF 页数:9 大小:498.43KB
返回 下载 相关 举报
2019-2020年高中英语Unit4Exploringplants-usinglanguage_第1页
第1页 / 共9页
亲,该文档总共9页,到这儿已超出免费预览范围,如果喜欢就下载吧!
资源描述

《2019-2020年高中英语Unit4Exploringplants-usinglanguage》由会员分享,可在线阅读,更多相关《2019-2020年高中英语Unit4Exploringplants-usinglanguage(9页珍藏版)》请在金锄头文库上搜索。

1、2019-2020 年高中英语Unit4Exploringplants-usinglanguage Part One: Teaching Design Period 3: A sample lesson plan for Using Language (FLOWERS AND THEIR ANIMAL POLLINATORS) Aims To help students read the passage FLOWERS AND THEIR ANIMAL POLLINATORS To help students to use the language by reading, listening,

2、 speaking and writing Procedures I. Warming up taking a quiz Take the following sentences in direct speech and put them into indirect (or reported) speech. She said, Ive worked here since I left my last job. She told me that she had worked there since she had left her last job. You said, I will help

3、 you! You said you would help me! She asked me, When are we going to leave? She asked me when we were going to leave. Peter said, I may bring someone with me to the party. Peter said he might bring someone with him to the party. My friend said, I will have finished my homework by the time you arrive

4、. My friend told me he would have finished his homework by the time I arrived. Mark asked me, Why do you want to study Russian? Mark asked me why I wanted to study Russian. Marcia said, I have been waiting for you for over an hour. Marcia said she had been waiting for me for over an hour. Alison sai

5、d, I had eaten before you arrived. Alison told me she had eaten before I had arrived. Lenny sang, I want to get away, I want to fly away Lenny sang he wanted to get away, he wanted to fly away. Jason asked me, Are you ing with me? Jason asked me if I was ing with him. II. Looking and talking Now go

6、to page 36. Look at the photos and listening to me talking to you about the living stones plant, Refflesia and pitcher plants. Pitcher plants (or pitfall traps) are carnivorous plants whose prey-trapping mechanism features a deep cavity filled with liquid. Insects such as flies are attracted to this

7、 cavity, often by visual lures such as anthocyanin pigments, and nectar bribes. The sides pf the pitcher are slippery and they are also grooved in such a way so as to ensure that the insects cannot climb out. The liquid contained within the pitcher traps, drowns, and gradually dissolves the body of

8、the insect. This may occur by bacterial action, or be due to enzymes secreted by the plant itself. Furthermore, some pitcher plants contain mutualistic insect larvae, which feed on trapped prey, and whose excreta the plant absorbs. Whatever the mechanism of digestion, the prey items are converted in

9、to a soup of amino acids, peptides, phosphate, ammonium and urea, from which the plant obtains its mineral nutrition (particularly nitrogen and phosphorus). Like all carnivorous plants, they occur in locations where the soil is too poor in minerals and/or too acidic for most plants to be able to gro

10、w. Rafflesia is a genus of parasitic flowers. It contains 18 species (including four inpletely known species as recognized by Meijer 1997), all found in South-East Asia, on the Malay Peninsula, Borneo, Sumatra and Kalimantan, and the Philippines. The flowers have no leaves and hardly any stem, just

11、a huge speckled five-petaled flower with a diameter up to one metre, and weighing up to 10 kg. Even the smallest species, R. manillana, has 20 cm diameter flowers. The flowers smell like rotting meat, hence its local names which translate to corpse flower or meat flower. It is parasitic on a vine, s

12、preading its roots inside the vine. The fruit is eaten by tree shrews. Rafflesia is a official state flower of Sabah in Malaysia. The species Rafflesia arnoldii is the worlds largest single flower. It was discovered in the Indonesian rain forest by Sir Thomas Stamford Raffles and Dr. Joseph Arnold i

13、n 1818. The worlds largest inflorescence is borne by the Talipot palm (Corypha umbraculifera). The largest unbranched inflorescence is the Titan Arum (Amorphophallus titanum) from the family Araceae. Now you are going to listen to a talk by Mark, Gordon and Andrea telling about these three unusual p

14、lants and plete the two charts on page 36. III. Reading for forms Read the text FLOWERS AND THEIR ANIMAL POLLINATORS on page 38 to: cut/ the sentence into thought groups, blacken the predicative, darken the connectives and underline all the useful expressions. FLOWERS AND THEIR ANIMAL POLLINATORS 0v

15、er time, many flowering plants/ and their animal pollinators have evolved togetherThe plant needs the animal /to pollinate it /and the animal is rewarded with food/ called nectar /when it visits the flowers Pollen bees attached to the animal /during its visit to a flower/ and is then passed on to an

16、other plants blossom /on its next visitSo pollination takes place ,therefore increasing the chances/ of the survival /of the plant species. Through evolution,most flowers have adapted to attract specific types of pollinatorsBees, moths /and butterflies are the most important pollinatorsFlies ,wasps,beetles/ and other animals /such as birds /and bats are less mon The type of pollinator depends on the characteristics of the

展开阅读全文
相关资源
正为您匹配相似的精品文档
相关搜索

最新文档


当前位置:首页 > 大杂烩/其它

电脑版 |金锄头文库版权所有
经营许可证:蜀ICP备13022795号 | 川公网安备 51140202000112号