"There is Only One Earth" PPT Courseware 2

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"There is Only One Earth" PPT Courseware 2

When is "Earth Day"? Do you know what the significance of "Earth Day" is?

April 22nd every year is "World Earth Day". This is a worldwide environmental protection activity that aims to arouse human beings' awareness of caring for the earth and protecting their homeland, promote the coordinated development of resource development and environmental protection, and thereby improve the overall health of the earth. environment.

Do you recognize the words below? Please use each character to form at least one word.

Miao mine gives generosity

generous see bright

Do you recognize the following words?

crystal resources minerals gifts

exhaustion abuse threat witness

Generosity, affability, travel

The universe is small and bright

Travel - wander; travel.

Brilliant - This refers to dazzling pearls and jade. This refers to various planets that are bright and dazzling.

Universe—the infinite space including the earth and all other celestial bodies.

Gift—originally refers to a reward given by an emperor, but now generally refers to charity given out of mercy.

Be generous—don’t be stingy.

Exhausted - exhausted.

Witness – see with one’s own eyes.

Geology—The composition and structure of the earth's crust.

Abuse - excessive use without moderation. Indiscriminately, without choice or restriction.

1. (1, 2) The earth is beautiful, spectacular, approachable and lovely, but the scope of human activities on the earth is very small.

2. (3, 4) The natural resources on the earth are limited.

3. (5-7) Human beings cannot expect to move to other planets after destroying the earth.

4. (8, 9) We must carefully protect the earth and the global environment.

summary:

Through study, we have a preliminary understanding of the earth and know that it looks very── (beautiful and spectacular), but compared with the universe, it appears very── (tiny).

What she contains──(natural resources are limited), if she is destroyed, human beings──cannot migrate to other planets.

It is based on these understandings that the article makes an appeal to mankind──(There is only one earth).

The text introduces the overview of the earth from the following aspects.

⑴From the perspective of the earth’s position in the entire universe, the earth is very small.

The radius of the earth is "only" more than 6,300 kilometers. In the entire universe, it is like a "flat boat". A number and a metaphor illustrate the insignificance of the earth in the universe.

⑵The scope of human activities is very small. The earth's surface area is 510 million square kilometers, and the land where humans live "only accounts for" one-fifth of it.

⑶The earth’s resources are limited and suffer from uncontrolled exploitation and random destruction. The formation of mineral resources takes "millions or even hundreds of millions of years", so "if they are exploited without restraint", they may face the risk of "exhaustion". Various renewable resources, such as water resources, forest resources, biological resources, and atmospheric resources, cannot be "regenerated" due to people's "arbitrary destruction" and "abuse of chemicals". They have also caused "ecological disasters" and threatened human survival. .

⑷There is no second planet for human beings to live on. The text cites scientific research results to show that there is no second star suitable for human habitation "at least within a range of 40 trillion kilometers centered on the Earth." As for the idea of ​​building an immigration base on Mars or the moon, even if it is "realized", it is unlikely that many people will live there.

Explain method

(1) List of numbers: It is a planet with a radius of only more than 6,300 meters.

Scientists have proven that there is no second planet suitable for human habitation, at least within a range of 40 trillion kilometers centered on the Earth.

(2) For comparison: However, compared with the vast universe, the earth is small.

(3) Categories: Water resources, forest resources, biological resources, and atmospheric resources needed for human life can be continuously regenerated and contribute to mankind in the long term.

(4) For example: Take mineral resources as an example. They are not a gift from God, but are formed after millions or even hundreds of millions of years of geological changes.

(5) For example: The earth, the mother of mankind, the cradle of life, is so beautiful, spectacular, and amiable.

It is a planet with a radius of only more than 6,300 kilometers. In the universe of bright stars, it is like a small boat.

(6) Hypothesis: There is only one Earth. If it is destroyed, we will have nowhere to go. If all the resources on the Earth are depleted, it will be difficult for us to replenish them from other places.

What does a "broken" Earth really mean?

Why the word "broken"?

"Broken" here refers to people's "uncontrolled" mining of mineral resources, "random destruction of natural resources" and "reckless abuse of chemicals" that cause the destruction of renewable resources. The use of "broken" is to remind people that if resources are "uncontrolled" and "randomly destroyed", the lovely earth may become "broken." It reminds people how important it is to protect the ecological environment of the earth!

Why do astronauts sigh like this?

The reason why the earth is said to be lovely is that it selflessly dedicates resources to provide guarantee for human survival; to say that the earth is easily broken actually means that it is easily damaged, such as resource depletion, ecological disasters, etc. This sentence expresses the astronauts' praise for the earth, and at the same time it also reflects the astronauts' concern for the earth.

Discussion: How should we protect the earth?

I am a primary school student. I swear to Mother Earth that I am determined to join the ranks of environmental protection, cherish the earth, be kind to the earth, start from a young age, start from me, and strive to be a little environmental protection guardian!

Through studying the text, we know that the earth is beautiful and spectacular, but it is also small. The range in which we humans live is even smaller. We should cherish it and love it. But some people simply don’t understand the environment we live in. They don’t understand that the natural resources we have are limited and cannot be destroyed at will.

Keywords: There is only one teaching courseware for the earth, Chinese courseware for the second volume of the fourth grade of Chinese version A, Chinese courseware for the fourth grade Chinese slideshow download, There is only one PPT courseware for the earth, .ppt format

For more information about the "There is Only One Earth" PPT courseware, please click the "There is Only One Earth" ppt tag.

"There is Only One Earth" PPT courseware:

"There is Only One Earth" PPT courseware I can read and write correctly: distant view, crystal, resource, mineral, gift, moderation, depletion, abuse, threat, hope, imagination, immigration, broken, witness, affable, think: What aspects of the earth are written in the text? 1. The beauty of the earth...

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Update Time: 2024-10-18

This template belongs to Chinese courseware Version A, Chinese for Grade 4, Volume 2 industry PPT template

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