English composition about dinosaurs

Dinosaurs are giant creatures that appeared on the earth millions of years ago. Many years later, due to climate change, they became extinct, and they could no longer find any food to eat. Today, people know that dinosaurs once existed, because scientists found their skeletal remains when digging underground. We can see the bones of these dinosaurs in the museum now.

The history of the earth has been 4.5 billion years.

The earliest creatures appeared 3.8 billion years ago.

Since then, many creatures on the earth have experienced the process of rise, decline and even extinction, and only fossils have survived to this day.

Now we can find different kinds of fossils in different periods all over the world, which tell us the history of earth changes.

More than 200 million years ago, there lived a group of creatures-dinosaurs.

They flourished and ruled the earth for 65.438+0.5 billion years.

Dinosaurs were extinct before humans appeared, and no one had ever seen a living dinosaur.

Everything we know about dinosaurs today comes from dinosaur fossils.

Because people found fossils of their bones, teeth and eggs, as well as traces of skin, footprints and caves, scientists explored the secrets about dinosaurs according to these clues.

The earth has a history of 45 billion years. Before the earliest animals appeared 38 million years ago. Since then, many PLA people have experienced the rise, decline and extinction of biotechnology, and only fossils have been preserved so far. Now different types of fossils can be found in the world in different periods, which tell the earth-shaking history of our PLA. Back more than 200 million years ago, there lived a group of animals-dinosaurs. They are very popular and dominate the earth for 65,438+500,000 years. Before humans appeared, dinosaurs were extinct, and no one saw dinosaurs alive. Today, we learned everything about dinosaurs from dinosaur fossils. As people discovered their bones, teeth, egg fossils, skin marks, footprints and other cave sites, scientists discovered the secrets of dinosaurs based on these clues.

Dinosaurs are huge animals that appeared on the earth millions of years ago. Many years later, due to climate change, they became alien species, and they could no longer find any food. Today, people know that dinosaurs once existed, because scientists found their skeletal remains when digging underground. We can see the bones of these dinosaurs in the museum now.

The Mystery of Dinosaur Extinction The Mystery of Dinosaur Extinction More than 200,000 years ago, a large number of reptiles lived on the land, which is also known as the "reptile era" of the Mesozoic era, and a wide variety of vertebrates first appeared on the earth. At that time, the earth's climate was warm and covered with dense forests. Reptiles had enough food and gradually prospered, with more and more species. They continue to differentiate into different types of reptiles, some become today's turtles, some become crocodiles, and some become today's snakes and lizards. They are a kind of mammals all over the world. All dinosaurs are the largest class of reptiles, which are very suitable for living in swamps and shallow lakes. When the air is warm and humid, food is also very easy to find. Therefore, dinosaurs ruled the earth for millions of years, but somehow, they suddenly became extinct in a short period of time 6500 years ago, and people only saw a large number of dinosaur fossils left at that time. The reason for the extinction of dinosaurs is still under study. For a long time, the most authoritative view is a large meteorite related to the extinction of dinosaurs 6500 years ago. According to research, an asteroid with a diameter of 7- 10 km once fell on the surface of the earth, causing a big explosion, such as throwing a lot of dust in the atmosphere to form a dusty home that covered the sun, which led to the suspension of plant photosynthesis and the extinction of dinosaurs.

English composition about dinosaurs, grade five, eight sentences is enough, if you want to translate it, it must be grade five water ... Once upon a time, an old farmer planted a rice field and pulled out the seeds to help them grow. He goes to the field to watch the seedlings grow every day. He saw the buds come out of the ground and grow taller every day. But he still thinks they grow too slowly. He is impatient with the seedlings. "How can plants grow faster?" He tossed and turned at night and couldn't sleep. An idea suddenly occurred to him. He has an idea, don't wait until dawn. He jumped out of bed and rushed to the field. By moonlight, he began to cultivate seedlings. He pulled up the seedlings by half an inch one by one. When he finished, it was already morning. He straightened up and said to himself, "What a great idea! Look, how much these plants have grown overnight! " He went home with great satisfaction. He told his son what he had done in a triumphant tone. His son was shocked. Now the sun has risen. Seeing all the uprooted seedlings dead, the young man was heartbroken. People now use "Eight Wonderful Zhang Zhu" to describe the behavior of people who are so eager to get something that it will only make things worse. Idols are a bit like the English proverb "haste makes waste"-spilling things through exciting enthusiasm. Once upon a time, a farmer planted rice seedlings, hoping to harvest them early.

Every day when he goes to the rice field, he finds that the seedlings grow slowly.

He was impatient and thought, "How can we make rice seedlings grow tall and fast?" ? He thought and thought, and finally came up with a "best way", which is to set the rice seedlings a few points higher.

After hard work, he took a hoe and went home to rest.

I think: the seedlings will grow taller tomorrow.

The next morning, when he got up early, he couldn't wait to get up and go to the rice field to see his "achievements".

Unexpectedly, when he ran to the rice field, he saw all the seedlings withered.

The 60 words of the English composition "Dinosaur in My Mind" can also be written in Chinese. I am a dinosaur, the most precious dinosaur hidden in grandma's heart, and the object of grandma's first-class protection.

Dad said I don't need to stay with my grandmother. My diet and behavior habits are poor. I am as timid as a mouse.

Perhaps, my grandmother dotes on me too much, obeys me very much and dotes on me very much. If someone scolds me, grandma will be furious.

It's not that grandma is bad, but that grandma is too good to me. Now that I have grown up, I need to reflect.

All dinosaurs have been extinct, but the descendants of dinosaurs-birds have survived and multiplied to this day.

Dinosaur (English: Dinosaur) is a terrestrial animal that lived about 230 million years ago and was able to walk upright on its hind legs. It is a diverse group of dominant vertebrates in Mesozoic. Most of them belong to terrestrial reptiles, but they can walk upright and occupy a dominant position in the global terrestrial ecosystem for more than10.6 billion years.

Dinosaur is an animal that lived about 235 million to 65 million years ago and was able to walk upright on its hind legs. They have ruled the global terrestrial ecosystem for more than 654.38 million+600 million years.

Most dinosaurs have been extinct, but the descendants of dinosaurs-birds have survived and multiplied to this day.

Besides, in spoken language, dinosaurs refer to ugly women.

The word "dinosaur" has two meanings in the dictionary: an ancient animal that lived hundreds of millions of years ago and is now extinct; (Internet language) a woman with poor looks.

From the early Jurassic to the late Cretaceous, the dinosaur family adapted to the environment and developed rapidly, which led to the development of dinosaurs in the direction of diversity and the increase of dinosaur population, which gave dinosaurs an advantage and enabled them to dominate the terrestrial ecosystem of the earth.

There are many kinds of dinosaurs, and their shapes and habits are also very different.

Among them, the big one can be as big as dozens of elephants combined; Small, but almost like a chicken.

As far as eating habits are concerned, dinosaurs are docile vegetarians (dinosaurs that eat plants) and fierce carnivores (dinosaurs that eat animals), and they are also omnivorous dinosaurs that eat both vegetarians and vegetarians. The oldest reptile fossils can be traced back to the "Pennsylvanian period" of Paleozoic (about 320 million years ago-280 million years ago).

Tracing back to the source, it evolved from amphibians.

Amphibian eggs need to be in water to start developing.

Reptiles have evolved eggshells to prevent water from escaping from eggs.

This major reform enables reptiles to survive without water.

From 245 million years ago to the Mesozoic era 65 million years ago, reptiles became the master of the earth's ecology, so the Mesozoic era was also called the reptile era.

Large reptile dinosaurs appeared in the early Mesozoic.

The herbivorous confusing dragon is the largest terrestrial animal in size and weight.

Spinosaurus is by far the largest carnivore on land.

In addition, ichthyosaurs living in the sea, plesiosaurs living in the air and pterosaurs formed a complex and perfect ecosystem.

Reptiles have flourished on the earth for about 65.438+0.8 billion years.

Among the animals of this era, dinosaurs are the most famous.

When people mention dinosaurs, they will see a huge and fierce animal. In fact, there are also small and docile species among dinosaurs.

Dinosaurs belong to vertebrate reptiles. They once lived in swamps and bushes on Mesozoic land. Their hind limbs are longer than their forelimbs and have tails.

Many of them are carnivores and many are herbivores.

Among them, the slower-developing species are similar to the oldest crocodiles and beaks, while the more developed species are similar to birds.

Beijing time101October 30th news, for a long time, paleontologists have been unable to determine whether dinosaurs migrated like birds or wildebeests.

Because of the possible threat of Allosaurus (a distant relative of Tyrannosaurus Rex), it is not a very far-fetched idea for giant herbivorous dinosaurs to migrate on the grassland.

Now, researchers at the University of Colorado in the United States have proved for the first time that dinosaurs also migrated when their living environment deteriorated.

Researchers used oxygen in tooth fossils to prove for the first time that dinosaurs migrated between flooded plains.

The archaeopteryx fossils found in 1862 are very similar to those of Macrognathus, but the difference is that the archaeopteryx fossils have obvious feathers (Macrognathus also has feathers, but they are primitive). In fact, quite a few carnivorous dinosaurs have primitive feathers, which indicates that dinosaurs and birds may be close relatives.

Since 1970, many research reports have pointed out that modern birds are probably the direct descendants of theropod dinosaurs.

At present, most scientists regard birds as the only dinosaurs that have survived and developed to this day, and a few even think that they should be classified into the same category in biology (that is, dinosaurs that have not yet been established).

Crocodiles are modern close relatives of another group of dinosaurs, but their relationship is farther than that between dinosaurs and birds.

Dinosaurs, birds and crocodiles all belong to the evolutionary branch of reptiles, which first appeared in the late Permian and became the dominant fauna in the middle Triassic.

From the discovery of dinosaurs to the first 60 years of the 20th century, scientists and mass media regarded dinosaurs as lazy and slow-moving cold-blooded animals due to their lack of understanding of dinosaurs.

However, since the revival of dinosaurs in 1970s, some people think that dinosaurs may be active warm-blooded animals and may have social behaviors.

Many recent evidences of the relationship between dinosaurs and birds support the view that dinosaurs were warm-blooded animals.

But what is the truth needs further study.

In fact, human beings have a long history of discovering dinosaur fossils.

Long before the discovery of Iguanodon, Europeans knew that there were many grotesque huge bone fossils buried underground.

It was not until Iguanodon was discovered and compared with iguanas that the scientific community initially determined that it was an extinct reptile similar to lizards.

1842, British paleontologist Charles Owen coined the word "dinosaur".

English dinosaurs came from the Greek deinos (scary) Saurosc (lizard or reptile).

For Owen at that time, this "terrible lizard" or "terrible reptile" refers to a large extinct reptile (but it is not).

In fact, not many dinosaurs were found at that time.

Since 1989 discovered dinosaurs in Antarctica, dinosaur remains have been found in seven continents all over the world.

At present, there are at least 650 to 700 species (biological species) of dinosaurs described in the world.

Later, scholars in China, Japan and other countries translated it into dinosaurs, because these countries have always had legends about dragons. They thought that dragons were the length of scale worms, while snakes were other names for dragons.

Dinosaurs lived on the earth for nearly 65.438+0.7 billion years. In such a long time, many changes have taken place in our environment.

The Pangu continent, which was originally connected as a whole, gradually drifted and split into the form we are familiar with now.

After these earth plates drifted around the world, the climate environment changed because the light was no longer uniform and the heat conduction was blocked by the ocean.

In the early dinosaur era, ferns were made up of ...

Today, I went to see a wonderful dinosaur exhibition with my father, grandfather and brother.

The dinosaur exhibition is located in the children's park. As soon as you enter the gate of the children's park, you will see a big poster that says "Return to Jurassic". If you go further inside, you will see a tall robot, Shu Long. If you go any further, you will reach the entrance of the dinosaur exhibition.

When we entered the dinosaur exhibition area, we saw lifelike dinosaur robots. They are as tall as the dinosaurs described in the book. We seem to have entered Jurassic Park directly, and the terrible cries of dinosaurs came from time to time.

In the dinosaur world, there are "tall" Liang Long, Stegosaurus with triangular bone plates on its back and Deinonychus with terrible claws ... Walking, we came to the exhibition hall of Tyrannosaurus Rex, the most ferocious carnivorous dinosaur. That Tyrannosaurus Rex is exactly like the Tyrannosaurus Rex in Jurassic Park, as if it were about to eat us.

The skin of these dinosaurs is made of rubber, and there is a sound box next to it, from which the sound of dinosaurs comes.

Those dinosaurs have strange sounds, and sometimes they suddenly scream loudly, and you will be shocked by this cry; Some dinosaur heads will hide in the bushes, and when you come across them, they will frighten you out of your wits.

Why did the huge dinosaur family disappear? According to scientists' speculation, because the earthquake separated the mainland, the climate in various places changed greatly, and dinosaurs could not adapt and eventually became extinct.

This dinosaur exhibition has made me know more about dinosaurs, and I hope to further discover the mysteries of dinosaurs.

There is an English introduction about Hong Kong Disneyland. Lines 5-6 will do. An English article about dinosaurs ...

Tyrannosaurus Rex, the overlord on the land, the most ferocious dinosaur Zhenlong, the world's largest dinosaur Megasaurus, and the world's smallest dinosaurs sauropod and ornithosaurus.

The two main types of sauropods are sauropods and theropods.

Sauropods are divided into protosauropods and sauropods.

Huge animal groups such as theropod dinosaur, ornithopod dinosaur, stegosaurus, Ankylosaurus and pachycephalosaurus with a history of10.6 billion years suddenly collapsed at the end of Cretaceous. That's all, pure migrant workers, I don't know the question of 1

Tyrannosaurus Rex (also known as Tyrannosaurus Rex) is my favorite dinosaur. It is a large carnivorous dinosaur, about 65,438+03 meters long and weighing about 7 metric tons. It lived in the last 3 million years of the Mastrick stage at the end of Cretaceous. About 68.5 million to 65.5 million years ago. It was also one of the last dinosaur populations before the Cretaceous-Tertiary extinction event. Tyrannosaurus rex is my favorite dinosaur. It is a large carnivorous dinosaur, with a body length of 13 m and a weight of about 7 tons. It lived in Maastricht period at the end of Cretaceous, lasting for 3 million years, about 68.5 million to 65.5 million years ago. Tyrannosaurus Rex was one of the last dinosaur species before the Cretaceous-Tertiary extinction event.

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