"Amber" PPT (second lesson)

Description

"Amber" PPT (second lesson)

Part One: Learning Objectives

1. Read the text emotionally and understand the main content of the text.

2. Understand the formation process of amber, the conditions necessary for its formation and its scientific research value, and stimulate students' interest in exploring the mysteries of nature. (emphasis)

3. Learn to look up information and make reasonable assumptions based on the information in the article. Get a preliminary feel for the author's writing style that combines vivid imagination with scientific and rigorous reasoning, thereby feeling the literary and artistic nature of language and the rigor of thinking. (emphasis)

Amber PPT, part 2: reading and explaining doubts

How was this piece of amber formed? Let’s go into the text and take a look!

Discussion and exchange:

What are the characteristics of amber?

Amber is a transparent fossil evolved from rosin balls, and "flies and spiders" lie in this piece of amber.

What are the necessary conditions for the formation of amber?

1. There must be pine trees; 2. It is noon in hot summer and there is a scorching sun;

3. Form a rosin ball; 4. After a long period of crustal movement.

One summer day, the sun was shining warmly, the sea was roaring far away, and the green leaves were rustling on the trees.

The "sun" appears for the first time in the article. Sunlight is the cause of the melting of rosin and the first condition for the formation of amber. The description of the environment lays the foundation for the development of the story.

Suddenly, a spider crawled over slowly, wanting to treat the fly as a meal. It carefully paddled its long legs and climbed down the tree trunk, getting closer and closer to the little fly.

Why does the article describe the spider's movements in detail?

"Pull", "along" and "climb" describe the spider's movements. The words for these movements express the spider's single-minded desire to treat the flies as a meal, and at the same time explain the reasons why they are so close, promoting the The development of the story is also behind.

There are several descriptions of the sun in the first six natural paragraphs. How are they described? In which words are the changes in temperature reflected?

There are 3 places in total: ①The sun shines warmly;

②The sun shines brightly;

③The midday sun shines brightly on the entire forest.

The changes in temperature are: "warm", "fiery" and "hot", indicating that the weather is getting hotter and hotter, paving the way for the dripping of rosin below.

Amber PPT, the third part: looking up information and solving problems

Searching for information is to obtain methods or answers to problems you want to solve through the Internet, libraries, bookstores, or other channels. Looking up information on questions you don’t understand in the text is a way to read and understand the text.

Method: First: skim the text, sort out the questions, and then list the questions you don’t understand one by one; second step, determine which questions need to be solved by looking up information, and then determine the scope of the information to be checked. Don’t be confused and confused. Search for information. Step 3: Confirm the accuracy and rigor of the information found.

Application: In this lesson, "From that piece of amber, we can infer the details of the story that happened tens of millions of years ago" is determined through speculation in the book. So how many years did it take for amber to form? There are no answers in the text. So we can get the answer by looking up the question "How long does it take for amber to form?" By checking the information, we can know that the formation of amber takes tens of millions of years.

Amber PPT, part 4 content: structural theme

Text structure

condition:

Big tree dripping rosin in hot summer

Spiders swat at flies and were surrounded

The land sinks and the sea water rises and submerges

Discover:

Rolled to the beach

Children are curious

Father recognized

Value: Proves that flies and spiders existed in ancient times

Text gist

This article mainly writes about how amber was formed and discovered based on a strange piece of amber wrapped with a fly and a spider, as well as the scientific value of this piece of amber, which stimulates our interest in science and further Increased scientific knowledge of fossils.

How to use reasonable imagination

Imagination is a commonly used method in writing, which is to create new images based on the perception of the original image. The author of this article developed a reasonable imagination based on the shape of amber, and weaved a vivid and legendary story. How to carry out reasonable imagination in exercises? 1. Imagination should be based on reality, and use the method of describing reality to describe imaginary things. 2. Grasp the characteristics of things and expand your imagination. 3. Use accurate and vivid language to express your rich imagination.

Class summary

The scientific essay "Amber" uses vivid examples to tell the formation process of amber, allowing us to understand its scientific value, and also describes the mutations and gradual changes of life. The article has both vivid descriptions, vivid narratives, and scientific explanations. It is an interesting and thought-provoking text.

Amber PPT, Part 4: Classroom Development

The scientific essay "Amber" uses vivid examples to tell the formation process of amber, allowing us to understand its scientific value, and also describes the mutations and gradual changes of life. The article has both vivid descriptions, vivid narratives, and scientific explanations. It is an interesting and thought-provoking text.

Recommended reading

a special stone

Li Siguang is a famous geologist in my country.

When he was a child, he often played hide-and-seek games with his friends on a large lawn. Blindfold one child and call out "one, two, three" and the other children will quickly run away and hide. Some hid behind haystacks, and some hid in bushes, but Li Siguang loved to hide behind a big rock every time.

As time passed, Li Siguang became interested in this stone. This is a huge stone, and seven or eight children holding hands with open arms cannot surround it. It stood alone on the lawn, without a stone around it, which looked very out of place. Li Siguang thought: "Where did such a big stone come from?"

He told his friends about his doubts. The friends burst into laughter. They thought this question was so ridiculous and strange! "Where did the stone come from? It was already there!"

Li Siguang was not satisfied with the answers given by his friends at all, so he went to ask Father Chen Er, a well-informed old man in the village. Father Chen stroked his beard and said, "Well, it was here when I was a kid. My grandpa said it fell from the sky."

Li Siguang didn't believe it and asked his father again. Dad thought for a while and said: "When meteors fall to the ground, they turn into stones, called meteorites. Maybe this stone fell from the sky!"

"When such a heavy stone falls from the sky, it must be very powerful. It should hit the ground

Go into a deep pit. But why didn't it lie down in the soil? "

It’s really a matter of asking to the end! Dad shook his head and said, "I can't say that."

Where did this unexpected big rock come from? Why can't there be any other stones around? These questions have been lingering in Li Siguang's mind. When he grew up, Li Siguang went to England to study geology, inspected glaciers in other parts of the world, and understood that glaciers could push huge rocks to travel hundreds or even thousands of miles. He wondered, could the big rock in his hometown be pushed by glaciers from other places in ancient times? However, foreign scholars assert that there are no Quaternary glaciers in China.

After returning to China, Li Siguang began to investigate and study China's glaciers, traveling all over the north and south of the Yangtze River and up and down the Yellow River. In 1921, Quaternary glacial relics were discovered in the eastern foothills of the Taihang Mountains and the Datong Basin in Shanxi. Later, many glacial relics were discovered. These scientific discoveries overturned the erroneous assertions of some foreign scholars and laid the foundation for the study of Quaternary glaciers in China.

Thinking: 1. What results did Li Siguang achieve from this special big stone?

2. What other questions can you ask and try to solve them.

Keywords: Free download of PPT courseware for the fourth grade Chinese language volume 2 of Ministry of Education Edition, Amber PPT download, .PPT format;

For more information about the "Amber" PPT courseware, please click the Amber PPT tab.

"Amber" PPT download:

"Amber" PPT download, 28 pages in total. Pre-class introduction: Do students know what the crystal clear thing in the picture above is? Amber is a transparent biological fossil that was formed 40 million to 60 million years ago. It is the resin of plants such as Coniferous, Calypsocarpa, and Araucariaceae..

"Amber" PPT (Lesson 2):

"Amber" PPT (Lesson 2) Part 1 Content: Learning Objectives 1. Understand the content of the text, so that students can know the process of the formation and discovery of amber and its scientific value, and understand the rationality of the author's speculation and imagination. (Key Points) 2. Understand how scientists carry out collaboration...

"Amber" PPT (Lesson 1):

"Amber" PPT (Lesson 1) Part 1 content: Learning objectives 1. Recognize 12 new characters such as amber, amber, hum, and fat, and be able to write 15 new characters such as anger, roar, fat, swab, and so on. Understand words composed of new words. (Key points) 2. Understand the content of the text and clarify the narrative sequence of the text. ..

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Update Time: 2024-07-25

This template belongs to Chinese courseware The second volume of fourth-grade Chinese compiled by the People's Education Publishing House industry PPT template

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