"What's in the Universe" PPT courseware

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"What's in the Universe" PPT courseware

Perceive the text

1. Read the text in your favorite way and briefly introduce what is in the universe?

2. Identify the following pictures according to the text and explain the reasons.

Study the text

Read paragraphs 1-11 of the text, talk about what materials in the universe the article introduces to us, and fill in the table below.

star

A How many categories can we introduce stars?

B What does it tell you about stars?

C What are the similarities and differences between these stars?

D. In what order?

E What explanation methods are used?

Read the text (paragraphs 12-20) and think about the following questions:

1. In this part, how does the author introduce to us that "the universe is endless and moving"?

2. How many levels does it explain?

3. What explanation methods are used?

Find out in the text the examples that reflect the expository language accurately and vividly and the role of the explanatory method, make a brief analysis yourself, and make good annotations in the textbook.

1. How did you know that this Milky Way has submerged more than 10 million stars!

One "ten thousand" means one hundred million. The author does not say billions but ten thousand, which can highlight the number of stars in the sense of language.

2. Among these stars, I think there are many luminous planets orbiting them. Removing the idea will not affect the expression of the sentence. It expresses a speculative tone here, making the explanation more scientific and objective.

3. "A spacecraft that can fly 16.7 kilometers per second would have to travel tens of thousands of years" indicates that the stars are far away.

4. These stars are just like water droplets in the ocean.

Use metaphorical rhetoric to illustrate that stars occupy an extremely small space in the universe, thus explaining the vastness of the universe. Using things that people are familiar with as metaphors can make the explanation vivid and concrete, and help people understand the characteristics of the things being explained.

Text extension

Black holes can arise from the "death" of massive stars. When a massive star exhausts its internal nuclear fuel and reaches the end state of its evolution, the star becomes unstable and undergoes gravitational collapse, and the material of the dead star is destroyed. The weight will violently squeeze inward in all directions. When the gravity is so strong that there is no other repulsive force to oppose it, the star will be pressed into an isolated point called a "singularity".

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"What's in the Universe" PPT courseware 2:

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Update Time: 2024-07-03

This template belongs to Chinese courseware Jiangsu Education Edition Seventh Grade Chinese Language Volume 1 industry PPT template

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