资源简介

(共31张PPT)
Unit 5
Unit 5 Looking into nature
Secrets
caught in time
能够根据图片和标题，用所给词汇，猜测文章大意
读懂关于琥珀的科普说明文，并完成相应的练习
理解说明文的结构，学习其写作方法
归纳文章中的重点词汇，并运用在写作中
通过阅读文章，认识到科学发展需要实证，进而培养以自然事实为依据探索未知的科学思维
What are they
Where can you see them
Why do people study them
They are dinosaur bones.
In the museum.
To learn more about dinosaurs and the past.
What other things can tell us about the past
A piece of amber.
Here are two beautiful golden stones / two beautiful pieces of amber. What can you see in them
Some feathers.
Is amber about things in the past or things in the future
It is about things in the past. It can tell us how things have changed over time.
Watch the video and learn how amber is formed.
Look at the title and the pictures. What is the passage about Use the word cloud to help you.
The passage may be about:
A. How amber helps scientists unlock the secrets of nature.
B. How to make amber and use it in daily life.
C. How amber came into being.
Read the passage and check your answer.
What is the passage about
The passage is about how amber helps scientists unlock the secrets of nature. It serves as a window on the past and leads to important discoveries. It also shows how life has changed over time, offering a key to understanding the history of species.
How many secrets are mentioned in the passage What are they
Three.
The secret about the dinosaur
The secret about the flower
The secret about the ants
What’s in the amber
Where was it found
What did scientists find through it
What secrets does it tell
A dinosaur tail with feathers.
In Southeast Asia.
Dinosaurs had feathers.
What dinosaurs looked like.
Read Paras. 1-2 and complete the table.
Read Paras. 1-2 and answer the questions.
1. What was the common misunderstanding about dinosaurs
People used to think dinosaurs
looked like huge lizards
without feathers.
2. What changed this
misunderstanding
A dinosaur’s tail with feathers
found in a piece of amber.
What’s in the amber
Where was it found
What did scientists find through it
What secrets does it tell
A flower.
In Northern Europe.
The flower grew there 35 million years ago.
Life on earth has always changed.
Read Para. 3 and complete the table.
Read Para. 3 and answer the questions.
1. What is special about the flower inside the amber from Northern Europe
The species no longer grows in this area. But the find proves that it did 35 million years ago.
2. Why does the writer mention (提到) the amber from Northern Europe
To prove that amber helps us understand how life on earth has changed.
What’s in the amber
Where was it found
What did scientists find through it
What secrets does it tell
13 ants.
In Africa.
The ants are a completely new species. Ants did not only come from the northern half of the earth; they also lived in Africa.
There are many unknown species for us to discover.
Read Para. 4 and complete the table.
Read Para. 4 and answer the questions.
1. What was the old belief about the history of ants
Scientists used to believe that ants came from the northern half of the earth.
2. How did the discovery of the African amber change this belief
It proved that ants also came from the southern half of the earth.
1. What does the writer compare amber to
A window on the past and a key to unlock more secrets of nature.
Read Para. 5 and answer.
2. Why is amber called a “key”
Because it helps people uncover the secrets of nature and the history of life on earth.
3. What is the main purpose of the last paragraph
To encourage more research to better understand nature.
Choose where you are most likely to read this passage.
a In a popular science magazine about findings in nature.
b In a newspaper report on exhibitions about dinosaurs.
c In a sci-fi book about travelling 160 million years into the past.
It is about real scientific discoveries in nature.
Newspaper report is usually about events, for example an exhibition.
A sci-fi book tells imaginary (想象的) stories, like travelling into the past.
本文是一篇科普说明文。文章以琥珀这一“自然时间胶囊”为核心，介绍了人类通过琥珀获得的科学发现。
Complete the diagram with the words and expressions from the passage.
nature
secrets
Thanks to
(always) changed
35 million
unknown
ant
window
Amber shows us
what dinosaurs looked like.
life on earth has always changed.
a window on the past
a key to unlock more secrets of nature
there are many unknown species for us to discover.
Retell the passage according to the mind-map.
1. How do you understand the title
The title uses a metaphor (隐喻), comparing the ancient creatures (生物) sealed in amber to “secrets caught in time”. It attracts readers’ interest with a sense of mystery and also shows the charm of scientific exploration and the mystery of the unknown world.
2. What do you think of paragraph 1 Why does the writer begin like this
This paragraph is exciting and interesting. The writer begins like this to draw readers’ interest and make them want to read more.
Writers have different writing styles. They use
different methods to achieve their goals. These
goals include making the text alive, making their
arguments strong, getting readers’ attention, etc.
3. What are some other ways for you to learn about nature’s secrets
We can learn about nature’s secrets by reading, visiting museums, exploring the outdoors, doing research or doing experiments.
第一段以想象场景描写开篇，用imagine… 构建出恐龙觅食的动态画面。
故意打破人们对恐龙的传统印象，制造悬念
戛然而止，呼应标题中的 “secrets”,又自然引出下文对琥珀的介绍
以问句突显冲突
c
c
However 表转折；thanks to突出琥珀的关键作用
本段通过实例说明琥珀能够揭示古生物的特征，以“质疑— 举证—结论”为逻辑结构，潜移默化地传递出“科学需要证据”的思维方式
本段通过实例说明琥珀在物种演化研究中的价值
拟人句，承接上文
引出新观点（接下来的一句）
实例说明，使抽象的“演化”通过可视化的实例得以具象呈现
启下
本段通过实例说明琥珀有助于人类发现未知物种
以数据呈现琥珀的科研价值
以发现一种未知蚂蚁的实例具体说明
以问句结束，既体现科学探索的开放性，也再次呼应标题中的 “secrets”
用比喻与象征手法，升华琥珀的科学与人文价值，实现从“知识科普”到“精神启迪”的价值升华
四处奔跑
寻找
羽毛覆盖的
thanks to 多亏，幸亏
a piece of amber
一块琥珀
封存着过往的片段
不再
渐渐地，慢慢地
超过
作为了解过去的窗口
投入更多的精力
揭示更多的奥秘
used to do sth 过去经常(发生)，曾经
提出观点
For hundreds of years, people believe that…
Scientists now know that…
Scientists used to believe that…
展示价值
Thanks to…,…
…can tell us…, but that’s not all.
…also help us understand that…
…proves that…
The discovery of…has changed old beliefs about…
As a window on the past, …
I can
根据图片和标题，用所给词汇，猜测文章大意
读懂关于琥珀的科普说明文，并完成相应的练习
理解说明文的结构，学习其写作方法
归纳文章中的重点词汇，并运用在写作中
认识到科学发展需要实证，进而培养以自然事实为依据探索未知的科学思维
Search for a discovery in nature exploration. Focus on: what the discovery is, who made it and what’s amazing about it.
Write a short passage about how amber helps scientists unlock the secrets of nature.

展开更多......

收起↑