Write a composition on the topic of Mars-1 Project.

1. composition: "Mars 1" plans 500 words. Five billion years later, the earth exploded.

I became one of the most famous scientists and inventors left on earth. On the day when the earth exploded, I took my relatives and staff and fled to uninhabited Mars in my own spaceship.

The environment on Mars is really bad! Not only is there no water, no food, but also no oxygen needed for human survival. Moreover, the temperature here is over 100 degrees in the daytime, and it drops to nearly 200 degrees below zero at night.

How can we survive in such an environment? My answer is: use the highest scientific and technological achievements on earth to transform Mars and make it a planet suitable for our human survival. After listening to my words, my relatives and staff were shocked and asked in unison: "How to reform?" I quickly draw various designs and inventions on paper with my witty mind.

I'm going to launch a powerful bomb that can rise to the atmosphere first, so that the temperature of Mars in day and night will gradually be suitable for human survival. The ultraviolet rays of the sun will not harm our skin, but also form rain. Next, I plan to build a super big house, where my family and staff can live first, and then I will plant the seeds with the strongest vitality cultivated by biotechnology on Mars, and through photosynthesis, form the oxygen needed for human survival.

Ten years later, my plan finally came true. Now, we don't have to wear spacesuits, and we are not afraid of getting sunburned when we go out; The original plants have turned into forests, producing the same oxygen as the earth for us to breathe; More importantly, rain gradually accumulates into oceans and lakes, so that we can drink the fresh water necessary for life.

We have thrived here, and mankind has lived a happy life since then.

2. On the day when human beings lived on Mars, I wrote a composition of 300 words and 2050 words, and I came to Mars by "Explorer 1". Under the fiery red sky, I walked out of the hatch and started my "one-day trip to Mars". Just out of the hatch, there are a lot of intelligent creatures from Mars coming towards me, still talking about "Martians". I didn't understand a word, so I dug out the "Mars translator" from my pocket. After setting the text content, you can translate "Martian". The text is displayed on the screen. It turns out that aliens are saying, "Hello! Hello! Welcome to the "Mars Zoo", here is the ticket office, please pay the fee! " It turned out that my spaceship stopped in front of the "Mars Zoo", so I decided to go in and have a look. Walking into the zoo, I saw many "animals" on Mars, with long noses and short tails like rabbits. The tour guide told me that they were called "long-nosed rabbits". There is a thing with round ears and eight legs. The tour guide said it was called "Eight Legs Monster", which is very rare! After playing for two hours, my stomach was growling, so I went to a restaurant and tasted "Mars food". The food here looks strange: round, square, cylindrical, conical … I ordered a dish and a soup to taste. "Oh, it's delicious!" I couldn't help shouting, and then I wolfed it down. When I was full, I patted my chubby belly, bought a copy of "Cooking Secret Recipe of Mars Cuisine" and brought it back to the earth to study "Mars Cuisine". Later, I went to the largest "park" on Mars and visited the mountains and rivers on Mars. Under the guidance of the robot guide, I came to a specially set-up "lecture hall for Martian characters" in a park. People from other planets are especially welcome to learn "Fire Language" here, and the alien teachers inside are also very docile. After listening to a class, I thought it was not bad, so I left my robot pet "Little Dudu" here to let it learn "Fire Language". It's almost evening. I heard that Mars has a bonfire party every night, so I quickly went to the scene to buy tickets and have a good time. Bang, a string of fireworks rises; "hiss", several ribbons float into the sky ... the whole Mars is like a colored crystal ball, blooming under the decoration of fireworks and ribbons. "Ladies and gentlemen, the next is the performance time. Please enjoy' Dance of Mars'! " The alien host said. I have never heard of this kind of dance, so I have to see it with my own eyes. Suddenly, the music started and some alien girls were dancing. The dance is wonderful. After the dance, warm applause sounded and many people cheered. ...... "Oh, it's already midnight!" I shouted, "I should go back to earth!" " "I said, I came out from the bonfire party.

Teacher's comment: It seems that after reading this article, the teacher has to admire the imagination of the little author and show the readers those interesting and dangerous experiences on Mars through this article. As far as the content of the article is concerned, the little author mainly tells the protagonist's strange experience on Mars and those bonfire parties full of warm pictures. It seems that the little author's trip to Mars is not bad. But does the teacher think this article is not finished yet? The end of the article is a bit hasty, and I feel that I haven't finished writing yet. I hope the little author will pay attention in the future.

3. Write a composition on the future Mars.

What will be on Mars in the future? I think that in 2024, Mars will be a "simulated earth ball".

In 2024, the earth's environment has been seriously polluted, and people are forced to move away with other creatures, some to the moon and some to Mars.

When people came to Mars, they saw a piece of red here, but the air was good. They remember what happened on the earth, so they decided to transform Mars into a beautiful home and stop destroying it. So, everyone began to get busy: first, spread yellow bricks on the red land, with a black road in the middle and colorful flowers next to it; Then scatter all the nutrient soil on some peaks and sow all kinds of seeds; And built a garden with small houses. Each garden has a big pond, where you can swim and raise geese. ...

Mars has been transformed almost, and people will live with peace of mind. Two years later, people were surprised, right? After living for so long, why haven't you been sick? It turns out that human beings now love the environment, are peaceful and United, live in such a good environment, and certainly don't get sick.

Later, people invented a new type of car called "natural environment-friendly car". This kind of car does not exhaust, does not use oil, runs by natural forces, and can also suck the dust on the road!

Future Mars-a beautiful new earth!

4. Give an essay about writing Mars imagination and look forward to Mars.

This is a dark and old residential building, far from the street. There is nowhere to dump the garbage downstairs, and there are piles everywhere. To make matters worse, the corridors of the three units were all dark, either there was no light bulb or the light bulb was broken and no one changed it. Public ventilation window is in disrepair, with broken glass and some wind falling off. It's really scary to squeak when the wind blows. Strangely, the residents of such a building can live in peace. People seem to have long been used to the untidiness and mess here, but they don't feel any difference.

One day, a young man came here, rented a house on the ground floor of the middle unit, and prepared it as a wedding room. The young man is happy all day, as if he has endless energy. He first cleaned the stairs in front of the door with a broom, and then bought glass and replaced it with a public ventilation window fan. Then he stepped on a stool, repaired the light in the corridor, and pulled a rope so that people in and out of the corridor could switch it on and off conveniently. Many people feel a little embarrassed and take out a shovel from home to help him do it. It only took one morning to clean up the garbage under the whole building. At this time, the miracle began to appear: after a few days, the lights in the corridor from the first floor to the sixth floor of this unit where the young man lived gradually lit up, and the broken window sash was consciously repaired. When night falls, the harmonious lights are reflected from the ventilation window in the corridor, which is so peaceful and warm.

It seems that happy emotions are easily contagious, and the brand-new changes in this unit and the resulting beautiful and harmonious atmosphere are slowly infiltrating and spreading throughout the floor. If a person often walks here, he will be surprised to find that the light in front of this house is on tonight, and the light in front of that house is on again tomorrow night; People came out of the corridor with garbage bags, instead of just throwing them around like before, they consciously walked to the trash can across the street.

It never occurred to the young man that his small efforts changed the whole floor. This is not necessarily surprising, because people have gradually learned to muddle along because of the change of social atmosphere, so they have adopted an indifferent attitude towards some unimportant things. In fact, in the depths of most people's hearts, there is still a surge of love for sunshine, yearning and expectation for truth, goodness and beauty. At this time, as long as a little spark comes out, it will ignite the kindness and kindness in their hearts and let the fire of true feelings ignite.

Many times, the world we live in lacks such a Mars: gangsters who commit crimes in full view, dirty hands that reach into innocent people's pockets on the train, and sharp guns that shoot at birds in broad daylight. If a person stands up, it will activate many numb and timid hearts and stop crimes. One more Mars will add a touch of bright color to the world. Everyone will be Mars, and the world will be an ocean of love.

5. Can you write a composition of 1500 words about "Mars High School"?

Tips for writing papers for Mars High School;

1. The gravity on Mars is 0.3 times that of the earth, so we can jump very high with a light jump on Mars, which can be written from campus details such as throwing chalk, playing football and eating.

The temperature on Mars is very low and very dry. Available water resources are relatively small, so try to let go of the definition of campus, and don't confine it to a school gate or a playground. Because of different geographical conditions, it is impossible to have the same structure as schools on earth.

At present, NASA has not released whether there is life on Mars, but you can daydream and imagine that aliens will join hands with us or even attend classes together, but be careful not to show obvious flaws in this "alien".

4. Because the sun on Mars is blue because of the atmosphere, and most of the terrain is desert, some scholars who are good at describing the environment in words can describe the magical scene on Mars as much as they like, which will improve their goodwill, but don't write too arrogantly in case the teacher can't understand it.

5. On Mars, there are the highest mountains and deepest canyons in the solar system, which are called Mount Olympus and Mariner's Canyon respectively. There are two satellites on Mars called faubus and Damos. You can build this Mars school around these. It can give teachers a refreshing feeling.

The preliminaries end in two days. Remember to adopt me:-D.

6. Write a 200-word composition about my life on Mars.

Finally arrived at Mars!

One sunny morning, I came to Mars in a spaceship launched by China.

The Mars tour guide said to me, "Welcome to Mars. You are the10000th person to come to Mars, and you will enjoy our five-star treatment!" I followed her to a five-star hotel. I didn't expect the hotel to be the highest canyon among the eight planets in the solar system.

Martians are really talented. They built a big house in the canyon. I really don't know who finished this dangerous work. Although it's very cold on Mars, I haven't felt this way since I checked into the hotel. I asked the waiter curiously, and she replied disapprovingly, "This is because we poured a proper amount of magma into the bottom of the hotel. If it is hot, take out some; Put more when it's cold. " "It's that simple? Then our lives will be in danger at any time? " I asked in a panic: "You are really worrying, don't worry!" The waiter patted me on the head with a smile!

The next day, I got up early and slept really comfortably! What's the trip to Mars like? I wanted to know so much that I hurried to find a guide. The tour guide said, "Today, the widest river on Mars is surfing, ok?" "Great!" I jumped high with excitement. Surfing is my strong point, but it is on the earth. I wonder what surfing on Mars will be like.

With a keen heart, I followed the tour guide to the Boybrook River, the widest river on Mars. To my surprise, there are so many people. I sat on the plane and watched the crowd like little ants. I didn't expect so many people to visit Mars. What a surprise.

Anyway, I rushed into the sea of people with my surfboard and faced the waves! At this time, the sea suddenly swelled with waves more than ten meters high. I said excitedly, "Great, we can finally have a * * *!" Facing the waves, I made a pedal with my foot, but I didn't expect it to be several meters higher than those waves! Wow, what a sense of accomplishment!

On the third day, the guide took me to the gold on Venus.

On the fourth day, the tour guide took me to Saturn to make pottery;

On the fifth day, the tour guide took me fishing in Mercury.

……

The five-day travel time passed so fast that I missed it too much. I hate to go back to earth, but I will definitely come back!

7. Mankind is carrying out the "Mars-1" plan in a planned way. It is estimated that four people will be transported in the first four surveys before 2023:

1. Measuring the mass m of object A with a balance has nothing to do with measuring the mass and density of Mars, the speed of the first universe and the satellite period. This step is useless.

2. Measure the flight time t after the object A is thrown from the height h level, and determine the time h= according to the height.

2 gt2, we can see that g=

T2, we can know the acceleration g of gravity on the surface of Mars.

3. Observe the motion period of the spacecraft in uniform circular motion around Mars T. Provide centripetal force G according to gravity.

millimetre

r2 =m

4π2

T2 r, get the orbital radius of the spacecraft r=

three

GMT2

4π2

4. Measure the height h of the spacecraft from the sphere of Mars. Then r = h+R.

A, because the gravity of objects on the surface of Mars is equal to universal gravitation mg=

Ge-Mei-Mo: Male Pseudohermaphroditism Syndrome

R2, GM=R2g, r= substituted in 3.

three

R2gT2

4π2

Combine 4 to get

three

R2gT2

4π2

=H+R, so the radius r of Mars can be calculated by combining the value of gravity acceleration in 2, and the mass of Mars can be calculated according to GM=R2g. Therefore, if we want to infer the mass of Mars, we need 2, 3 and 4. So, A is wrong.

B, the first universe of Mars is v=

GR, from the above analysis, we can know the value of gravity acceleration and the radius of Mars from 2, 3 and 4, so B is correct.

C. If you want to know the period of Mars synchronous satellite, you need to know the rotation period of Mars, so you can't infer it from the meaning of the question, so C is wrong.

D, the density of Mars divided by the mass of Mars. According to the above analysis, we must know that the radius and mass of Mars should be inferred from 2,3,4, and 1, 2,4 cannot be inferred, so D is wrong.

Therefore, choose: B.

8. A Dutch company named "Mars 1" plans to send four astronauts to Mars A in 2023 to provide centripetal force G according to gravity.

millimetre

r2 =m(

2π

T )2r

Solution: T=2π

scold or beat

Because a and b have the same orbital radius. M ground =9M fire,

So TAB provides centripetal force g according to gravity.

millimetre

r2 =m