"Why are the flowers so red" PPT courseware 10

Description

"Why are the flowers so red" PPT courseware 10

About the Author

Jia Zuzhang (1901-1988), a famous biological science writer. A native of Haining, Zhejiang. His works are conveyed vividly and vividly in colorful literary ways. Scientific knowledge mainly based on biology has realized the marriage of literature and science. In March 1981, "Why Are the Flowers So Red" won the first prize for national popular science works.

teaching objectives

1. Knowledge and ability

Master the basics and understand the reasons for bonuses.

2. Process and methods

Read the text, clarify the structure of the article, and learn to use logical order to explain things. On this basis, explore why the article is written in this order, appreciate the vivid and accurate language of the article, and master the common explanation methods in this article.

3. Emotional values

Understand nature, love nature, and stimulate interest in exploring the mysteries of science.

Overall perception, word recognition

Read the text in your favorite way and try to solve the following questions.

1. Give phonetic notation to the following dotted words:

Burn ( ) injury Naked ( ) child

Nectary gland ( ) secretion ( )

Calyx ( ) Flower ( )

Poppy ( ) Beauty Triangular ( ) Mirror

Overall perception to clarify thoughts

Divide the structure of the article into hierarchies.

Part One (Paragraph 1): Put forward the center of explanation-why the flowers are so red.

Part 2 (paragraphs 2 to 10): Explain "why the flowers are so red" from different angles.

Part Three (Paragraph 1l): Summarize the reasons for the bonus and summarize the full text.

Experience the accuracy of descriptive language

1. Red flowers are the most colorful and dazzling, and can be said to be the most successful in the process of evolution. ()

The three adverbs of degree "most" emphasize the bright, dazzling and successful color of the red flower.

2. For example, peonies...the flower color is only pink. After artificial cultivation, just for the period in the middle of the Northern Song Dynasty (11th century), over several decades, it took... different forms. ()

"Only" emphasizes that it is limited to the pink variety.

The word "only" indicates the short time, indicating that artificial selection speeds up the bonus process.

The word "Ji" emphasizes that artificial cultivation creates a variety of colorful and colorful flowers in a short period of time.

Autonomous communication and overall perception

The title of the text borrows the name of an episode in "Visitors from the Iceberg". What rhetorical techniques are used? Do you think this is a good way to formulate the topic?

Why?

Used the rhetorical technique of asking questions.

It has three functions:

First, raising questions by grasping the well-known characteristics of flowers can help reveal the center of the article;

The second is to create doubts and interest, which is attractive;

Third, the main part of the article explains the reasons why the flowers are so red from six aspects. Each aspect starts with "Why are the flowers so red", which makes the article clear in context, fast-paced, and adds artistic interest.

Consolidate and expand

1. Expository writing is a style of writing with ( ) as the main mode of expression. According to the description object and purpose of explanation, expository writing can be divided into ( ) expository writing and ( ) expository writing. This article is an ( ) explanatory text.

2. The meaning of the title "red" is ( )

The author _____ is a __________ writer.

3. What famous ancient poems about flowers do you know?

"Flower" in the poem

1. Wait until the Double Ninth Festival to bring chrysanthemums. (Meng Haoran: "Passing the Old Friend's Village")

2. The sound of wind and rain at night makes you know how many flowers have fallen. (Meng Haoran's "Spring Dawn")

3. I shed tears when I feel the flowers, and I hate the other birds. (Du Fu: "Spring Hope")

4. Look at the red and wet places at dawn, and the flowers are heavy in Jinguancheng. (Du Fu: "Joyful Rain on a Spring Night")

5. The bamboo path leads to a secluded place, and the Zen room is deep with flowers and trees. (Chang Jian: "Inscribed on the Zen Temple behind Poshan Temple")

6. Helpless, the flowers fall away, and the familiar swallow returns. (Yan Shu: "Huanxi Sand")

7. Egrets fly in front of Xisai Mountain, and peach blossoms and flowing water make mandarin fish fat. (Zhang Zhihe's "Yu Gezi")

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"Why are the flowers so red" PPT:

"Why Are the Flowers So Red" PPT Part One Content: Text Introduction Flowers in nature are colorful and colorful. Classmates, when you stroll in the garden and enjoy the beauty and fragrance given to you by orchids in spring, lotus in summer, chrysanthemums in autumn, and plums in winter, have you ever...

"Why are the flowers so red" PPT courseware 11:

"Why Are the Flowers So Red" PPT Courseware 11 Independent Communication Overall Perception Read the text in the way you like and try to solve the following problems. 1. Pronounce the following dotted words: burn ( ) injury naked ( ) seed nectary ( ) secretion ( ) calyx ( ) flower (..

"Why are the flowers so red" PPT courseware 9:

"Why the Flowers Are So Red" PPT courseware 9 Explanatory text Classification of things Description: introduce the shape, structure, characteristics, and functions of things Principle description: explain the meaning, principle, relationship, and evolution of things Explanation methods: define, classify, give examples, and make Compare, compare...

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Update Time: 2024-11-08

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