"Why are the flowers so red" PPT courseware 7

Description

"Why are the flowers so red" PPT courseware 7

1. Introduction to the author

Jia Zuzhang was born in 1901 in Haining County, Zhejiang Province. He is an older generation of biologists and famous science popularization writers in my country. He is one of the pioneers of science popularization in my country.

2. Preview situation

charge pèi ( ): sufficient and vigorous.

Wither ( ) fade: (flowers and plants) dry up and wither.

Parallel pedicle ( ): refers to two flowers growing side by side on the same stem.

Poppy ( ) beauty naked ( ) seed flower stamen ( )

burn ( ), secretion ( ), flower huì ( )

citrus ( ) yōu ( ) long honey xiàn ( )

Triangular ( ) Mirror Pu ( ) Bank

【Reading Perception】

1. The title of the article was originally a song lyric. What are the benefits of such a title? Can you give any other similar examples?

2. How does the text explain the scientific principle of "bonus"? (Draw the article structure diagram)

Clarification: "Red" should be understood as "a thousand purples and reds". effect:

1. Raising questions by grasping the well-known characteristics of flowers will help reveal the center of the article;

2. Attract readers and stimulate interest;

3. 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.

Examples: "My future is not a dream", "Let's swing the oars", etc.

Subject hierarchy diagram

why are flowers so red

Internal reasons (2-7)

1. Material basis (with or without pigment)

2. Physical principles (light wave reflection)

3. Physiological needs (protective effect)

4. Evolutionary perspective (development process)

External reasons (8-10)

5. Natural selection (effect of insects)

6. Artificial selection (adding new species)

Summary of what you learned

This is a popular science explanatory article. The article introduces the scientific knowledge about why flowers are so red from different angles, focusing on explaining that the red color of flowers is formed by its own various conditions and needs as well as the effects of natural, artificial and other factors on it. The result praises human creative labor.

Classroom consolidation

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?

Exploring Pearls in the Sea of ​​Poetry:

Fill in the blanks in the poem with appropriate flower names.

1. Wait until the Double Ninth Festival, come again ( ).

2. The lotus leaves in the sky are infinitely green and reflect the sun ( ) in a unique red color.

3. People are leisurely ( ) falling, the night is quiet and the spring mountains are empty.

4. Three or two branches outside the bamboo ( ) are the prophets of the warmth of the spring river.

5. Suddenly, like a spring breeze coming overnight, thousands of trees ( ) bloom.

6. () The pond is a thousand feet deep, not as deep as Wang Lun’s love for me.

7. When I asked where the restaurant was, the shepherd boy pointed to ( ) village.

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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 10:

"Why Are the Flowers So Red" PPT courseware 10 About the author Jia Zuzhang (19011988) is a famous biological science writer. A native of Haining, Zhejiang. His works are conveyed vividly and vividly in colorful literary ways. Scientific knowledge, mainly biology, realizes literature and...

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Update Time: 2024-10-19

This template belongs to Chinese courseware Lu Jiao edition seventh grade Chinese language volume 2 industry PPT template

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