Unit 4 Exploring poetry Welcome to the unit 课件(共24张PPT)-译林版(2019)选修第一册

(共24张PPT)
牛津译林版高中英语学程一课件
Unit 4
Welcome to the unit Page 43
一、单元概述
主题语境：“人与自然”
话 题：“身边的科学”
语篇类型：宣传册、博客帖子、讲座文稿和杂志文章等。
学习目的：了解身边有趣的科学知识，认识到科学是生活的组成部分，严谨的科学研究可以是充满趣味的，激发我们努力学习和不断积累科学知识，树立远大的科学志向，坚定科学研究的信心。
二、单元教学内容
语言知识
>> 语音知识
正确朗读与科学相关的多音节词汇。
>> 词汇知识（略）
>> 语法知识
理解和掌握虚拟语气除虚拟条件句以外的其他用法，并学会在具体语境中正确运用目标语法。
>> 语篇知识
1. 观察和分析博客帖子的语篇结构和语言特征。
2. 掌握科普说明文的主要写作目的和语言特征。
3. 识别语篇中的修辞手段及其在语篇中的表意功能。
>> 语用知识
1. 运用得体的语言形式表达自己的态度、情感和观点，达到良好的交际效果。
2. 恰当使用虚拟语气，进行得体有效的交际。
文化知识
1. 了解与微生物学、仿生学、物理学有关的科学知识。
2. 了解科学家的成就和贡献，学习和借鉴人类文明的优秀成果。
语言技能
·听:1. 能借助录音了解语篇大意，获取有关微生物群系、仿生学的重点信息。
2. 能从听力材料中提取关于摩擦力的细节信息。
·说:
1. 能用科学知识解释说明日常的现象。
2. 能介绍微生物群系对人体的主要影响和仿生学的用途。
3. 能就摩擦力的概念、用途等展开讨论。
·读
1. 能通过阅读了解微生物群系的基本情况及其对人类健康的重要影响。
2. 能通过阅读获取有关大自然为仿生学提供灵感的重点信息。
3. 能将语篇的内容与自身的经历联系起来。
·写
1. 能运用自问自答的写作技能导入话题。
2. 能使用合理的结构和准确的语言完成关于摩擦力的写作任务。
学习策略
·元认知策略
1. 根据学习目的和需要，选择最合适的学习资源，拓展学习渠道。
2. 通过浏览网站、参观科技馆等方式学习更多与生活密切相关的科学知识。
·认知策略
1. 根据主题表达需要，合理运用语篇知识，有逻辑地组织信息结构。
2. 辨析作者说明事物的具体方式。
3. 有效地对所获取的信息进行筛选、分类和重组。
·交际策略
在就“身边的科学”这一话题进行交流时，监控语言的正确性和得
体性，并能通过非语言手段提高交际效果。
·情感策略
有持久的英语学习动力，增强运用英语学习科学知识的意识。
三、单元目标
1. 认识人类微生物群系的相关情况，意识到微生物的巨大作用。
2. 掌握虚拟语气其他情况的基本规则、功能和特点，并能在具体语境中正确理解和使用目标语法。
3. 撰写一篇介绍摩擦力的文章，了解摩擦力在实际生活中的应用。
4. 了解仿生学这一模仿大自然的学科，理解自然与科技结合的必要性。
5. 小组合作做一项科学小实验。
In this unit, we are going to:
read a blog post about the human microbiome;
write an article about friction;
read a science magazine article about bionics;
conduct a scientific experiment.
Welcome to the unit
◆ 内容分析
本板块话题是“生活中的科学”，以宣传册的形式介绍两个有趣的科学知识，说明星星为何能闪烁和花朵为何散发香气的科学原理，引导我们讨论日常生活中
有趣的科学现象，激发我们的探究欲望，为本单元的学习作好铺垫。
◆ 教学目标
By the end of this section, we will be able to:
1. understand the quote highlighting the value of science;
2. explain the reasons for stars twinkling and flowers giving off fragrance;
3. share our knowledge about some fun scientific facts;
4. increase awareness of the link between science and everyday life.
give off sth发出，放出（气味、热、光等）
Science is a way of life. Science is a perspective. Science is the process that takes us from confusion to understanding in a manner that’s precise, predictive and reliable ...
—Brian Greenee / bra n ɡri n/
科学是一种生活方式。科学是一种观点。科学是以一种精确、前瞻、可靠的方式使我们从困惑走向理解的过程……
——布赖恩 格林（美国物理学家）
pre·dict·ive /pr d kt v/ 预测的；预言的；前瞻的;预测的
How do you understand the quote from Brian Greene
The quote wants to emphasize science is inseparable from our daily life. Even though mysteries still exist, there are in fact scientific explanations to some of them. Scientists are working hard to do research in the hope of solving all the mysteries.
Science provides explanations for many everyday occurrences. Read the leaflet below and discuss the following questions in pairs.
Why do stars twinkle
When a star shines its steady light down on us through our atmosphere, the air bends the light. As the air moves, its temperature and density change, affecting the way the light bends.
oc·cur·rence / k r ns/ 发生的事情;存在的事物;发生;出现;存在
shine把…照向；使…光投向
Therefore, from our perspective, the starlight changes slightly in brightness and position. This makes the star seem to twinkle. Between us and the stars closer to the horizon, there is a lot more air, so they appear to twinkle more than those stars higher in the sky.
Why are flowers fragrant
The fragrance of a flower is released by its tissue. Each fragrance comes from a mixture of chemicals that float in the air.
star·light / stɑ la t/ 星光
Each flower’s fragrance is unique, attracting particular insects to the flower, which help spread its pollen so that seeds can be produced. Therefore, a flower’s fragrance is essential for the plant’s survival.
1.What causes stars to twinkle and flowers to be fragrant Explain in your own words.
Stars appear to twinkle because the atmosphere’s air particles are constantly moving, so they cause the light travelling through the air to bend in different ways.
This means that the brightness and position of the starlight change accordingly. Our position on the Earth also affects how much stars appear to twinkle. The atmosphere is thicker closer to the surface of the Earth, so stars near the horizon seem to twinkle more when we look at them through the thicker atmosphere.
A flower has its special tissue that releases a mixture of chemicals into the air,which forms the flower’s unique fragrance. This fragrance is important because it can attract certain insects to the flower, which help spread its pollen and ensure the production of seeds.
2. What other fun scientific facts do you know
I know why pandas are black and white. The panda’s white coat helps it blend in with snowy habitats, while the black helps it hide in forests. Pandas are active in both habitats, so they have evolved to be both black and white. However, their unique black-and-white pattern is important in other ways. The well-known cute black pattern on their head is used to communicate with other pandas.
coat动物皮毛 pattern图案；花样；式样
blend in (with sth/sb)（与环境）和谐，协调
Their dark eye patches may be used to show other panda competitors how they feel. As each panda’s markings are unique, they can also easily recognize one another. In
addition, its black ears may be used to warn away predators. / pred t (r)/ 捕食性动物;食肉动物
I know why our teeth do not grow or heal themselves. Our bodies do amazing things: cut hair and nails grow again, and broken bones knit back together.
patch /p t / 色斑;斑点;(与周围不同的)小块,小片
mark·ing / mɑ k / 斑纹，花纹，斑点
knit /n t/(断骨 )（使）愈合，接合
Unlike hair, nails and bones, enamel is not living so it cannot grow. It does not heal itself when it becomes damaged, and it grows back only once in a lifetime—when a second set of teeth replace the first set, known as our baby teeth, to fill up a bigger mouth.Therefore, it is important that we take good care of our teeth.
en·amel / n ml/ （牙齿的）珐琅质，釉质
baby tooth 乳牙
3.Why do you think there is fun in science
In my opinion, there is fun in science, because science is filled with wonders and mysteries, such as why dinosaurs became extinct and why the sky is blue. We are curious about the world around us. Science is a process of learning about the natural world we live in. Nearly everything in our daily life has a scientific explanation and it is fun to know it.
4.What affects the travel of the starlight
The travel of the starlight is affected by the air. When a star shines its light through our atmosphere, the air bends the light. As the air moves, its temperature and density change, affecting the way the light bends.
5.Why do the stars closer to the horizon appear to twinkle more than those stars higher in the sky
Because between us and the stars closer to the horizon, there is a lot more air, so they appear to twinkle more than those stars higher in the sky.
6.Why is a flower’s fragrance essential for the plant’s survival
Each flower’s fragrance is unique and it attracts particular insects to the flower,which help spread its pollen so that seeds can be produced.