Primary School Texts What is the Earth like, the text looks at each paragraph of our earth, the mean

What the earth is like.

I want to take advantage of the spaceship to the sky.

Look what the Earth looks like.

Yes! The Earth is a big ball.

Dressed in floral clothes.

Where the green is the forest.

There are also fields and pastures.

The yellow place is the desert.

The vast yellow sand is flying.

The white place is Antarctica.

Icebergs and snowy fields are vast.

Where the lights are shining at night?

It turned out to be a city, a village, and a mine.

In the future, I will take advantage of the spaceship to go to the sky.

At that time, the earth will be more beautiful and will be transformed.

The Earth is blue and white from space.

"There is only one earth". Excerpt from the original text: According to the astronauts who were fortunate enough to fly into space, they looked at the earth from afar as they traveled in the sky, and what caught their eyes was a crystal sphere with blue and white lines intertwined with each other, surrounded by a thin layer of aqua blue "gauze".

The earth, the mother of mankind, the cradle of life, is so beautiful and magnificent, and the sails are amiable.

However, the Earth is small compared to the vast universe. It is just over 6,300 kilometers in radius. In the starry universe, it's like a flat boat. It's only this big, and it won't grow again.

Introduction: There is only one earth" is a text in the eleventh volume of the six-year primary school Chinese of the People's Education Edition. The title runs through the whole text, first talking about the beauty and small size of the earth owned by human beings, then talking about the small scope of human activities and limited resources on the earth, then talking about the inability of human beings to migrate to other planets, and finally calling on human beings to carefully protect the only planet on which they can live.

Paragraph 1 ): The Earth is small, and the range of Earth available for human activity is even smaller.

Paragraph 2: The natural resources of the earth are limited, and some of them have been destroyed by humans.

Section 3 (5-7): In the universe, the planet that can be used for human life is the earth.

Paragraph 1): Talking about the small size of the earth, the area available for human activity is even smaller.

Paragraph 2: Talking about the limited natural resources of the earth, some of which have been destroyed by human beings.

Paragraph 3: In the universe, the planet that can be used for human survival is the earth.

There is only one earth text. How we should cherish our earth.

According to the astronauts who were fortunate enough to fly into space, they looked at the Earth as they traveled through the sky, and they were greeted by a crystal sphere with blue and white lines intertwined with each other, surrounded by a thin layer of aqua-blue "gauze". The earth, the mother of mankind, the cradle of life, is so beautiful and magnificent, so amiable. However, compared to the vast universe, the earth is small.

It is a planet with a radius of only more than 6,300 kilometers, and it is like a flat boat in the starry cosmic ocean. It's only so big that it won't grow again. The natural resources that the earth has are also limited.

Mineral resources, for example, are not a gift from God, but have been formed over millions or even hundreds of millions of years of geological changes. The earth is altruistic, and it generously provides mineral resources to humanity. However, if it is not exploited in moderation, it will accelerate the depletion of the earth's mineral resources.

The water resources, forest resources, biological resources, and atmospheric resources needed for human life can be continuously regenerated and contribute to mankind in the long run. However, because human beings destroy natural resources at will and recklessly abuse chemicals, they not only make them non-renewable, but also cause a series of ecological disasters, which pose a serious threat to human survival. Some people will say, isn't the universe very big?

There are countless planets out there, and when the earth's resources are depleted, can't we move to other planets? Scientists have proven that there is no second planet suitable for human habitation, at least within the 40 trillion kilometers centered on the Earth. Humanity cannot expect to move to another planet after destroying the Earth.

Yes, scientists have come up with many ideas, such as building colonization bases on Mars or the Moon. However, these visions, if realized, are a distant thing. Besides, how many people will be able to live there?

Our earth is so lovely, and at the same time too easily broken! This is the exclamation of astronauts when they travel to space and see the earth. There is only one Earth, and if it is destroyed, we have nowhere else to go.

If the planet's resources are depleted, it will be difficult for us to replenish them from elsewhere. Let's take care of the planet and protect its ecology. Let's make the planet work better for future generations.

The Earth is the third from the Sun.

planets, at a distance of about 150,000,000 kilometers from the Sun. The Earth orbits the Sun in the days and rotates once in the hour. Its diameter is 12,756 kilometers, which is just over a hundred kilometers larger than Venus.

78% of our Earth's atmosphere is nitrogen, 21% oxygen, and the remaining 1% is other components. The average temperature on the Earth's surface is 15 degrees Celsius, and the average air pressure is Pa.

The earth was formed 4.6 billion years ago, about 1.6 billion years ago, the earth only had 9 hours per day and night, which was much faster than the current rotation, about 800 days a year; By 600 million years ago, the day and night had extended to 20 hours and the year had shortened to 440 days, and the Earth was gradually slowing its rotation, probably due mainly to the tidal gravity of the Moon. It is believed that the formation of the Earth originated from the differentiation of solar nebulae. Over the course of 4.6 billion years, the Earth evolved from a homogeneous sphere to its present appearance"Circles"Structure.

The average thickness of the earth's crust is 17 kilometers, the thickness of the mantle is about 3473 kilometers, accounting for the volume of the earth, the temperature of the mantle is 1000 3000 degrees Celsius, the thickness of the core is about 3473 kilometers, accounting for the volume of the earth, the material is in a liquid state, and the temperature of the core is as high as 6000 degrees Celsius, which is about the same as the surface temperature of the sun.